The Babolat Racket Station can use the 20mm height riser side, as seen here, and many other machines can probably use that height as well.
Wrong Planet?
Yesterday a good friend was in the World Headquarters, and as usual, our discussion turned to player training, the necessity, and the over-training of players, mainly juniors!
This training may include the wrong equipment setup, unnecessarily stiff strings, and sometimes stiff, light racquets. This may cause injuries at every level of player from recreational to professional!
My friend, by the way, is a Collegiate All-American, a professional player, and a coach!
After we discussed how to change this behavior, she said something quite interesting;
“John, you are on a different planet!”
Yikes!
So two things can happen;
- Abandon my planet
- Invite you to join our planet!
We have chosen number 2!
- to invite you to our planet!
There will be no need for interplanetary travel right now, but we do need to pick a name for our planet, so, the person presenting the best name will be the Mayor of our planet (your name here)…for a while.
We hope you will join us and make our planet a place we can all go to discover, learn, share, and understand as much as we can about tennis equipment, customization, stringing, and “best practices”.
Please use the “Leave Comment” tab below to submit your name for our new planet!
Wilson Pro Staff Six One 100, v14
As you know the Wilson Pro Staff Six One franchise has been around about as long as wooden racquets have been gone! A long time!
Many racquets have come and gone. Some should not have “come” and some should not have “gone”, in my opinion.
This racquet, to me, is the epitome of the Pro Staff Six One series for a few reasons.
- The 100-square-inch head size is ideal.
- The thin 22mm beam is perfect.
- The Shiny Rust finish is the best of all Pro Staffs!
- The geometry and proportions are perfect.
- The stiffness (flex) is satisfyingly low.
Wilson shiny Rust Pro Staff Six One 100
The specifications will tell us more about the racquet, but here are some things that don’t appear on the “spec” sheet.
- This is a foam-filled racquet.
- The FORTY-FIVE layup is used in this racquet.
- The grommet barrels are large enough to allow string movement.
- The bumper guard “string valley” is very deep.
Let’s take a look at the specifications.
| Manufacturer | Wilson |
|---|---|
| Racquet Model | Wilson Pro Staff Six One |
| Reference Tension | 55 |
| String | PEEK 7710 |
| Machine Used | True Tension Professional |
| String Bed Stiffness - RDC | 52.0 Units |
| String Bed Stiffness -FlexFour | 58.6 Pounds |
| String Bed Stiffness - SBS | 50.6 pounds |
| String Bed Stiffness - ERT | 35 Kg/Cm |
| Racquet Flex, RDC | 63 - After stringing |
| Racquet Flex, FlexFour | 50.0 |
| Racquet - In Plane Stiffness | 487.2 Lbs/Inch |
| Weight, Grams | 332 |
| Weight, Ounces | 11.71 |
| Balance, mm | 330 |
| Balance, Inch | 12.99 |
| Length, Cm | 68.6 |
| Length, Inch | 27.03 |
| Head Width | 9.87 |
| Head Length | 12.82 |
| Head Area, cm2 | 641.2 |
| Head Area, Sq. Inch | 99.4 |
| Beam Height @ Grip, mm | 22.0 |
| Beam Height @ Mid, mm | 22.0 |
| Beam Height @ Tip | 22.0 |
| Beam Width @ Grip, mm | 12.85 |
| Beam Width @ Throat, mm | 12.65 |
| Beam Width @ Mid, mm | 12.38 (PWS) |
| Beam Width @ Tip, mm | 12.27 (including bumper) |
| Number of Main Strings | 16 |
| Number of Cross Strings | 19 |
| Ratio Cross/Mains | .648 |
| Main String Grid | 7.20 |
| Cross String Grid | 10.06 |
| Density (% of head filled with string) | 72.9% |
| Average Cross String Space | .529 |
| Average Main String Space | .450 |
| Dynamic Tension, Kp, ERT MasterTensometer | 35 |
| Dynamic Tension, Lbs/in | 195.76 |
| First Moment, Nm | .847 |
| Polar Moment | 343.0 |
| Torsional Stability | 16 |
| Swing Weight, Kg/cm2 | 327 |
| Swing Weight, Ounces | 11.53 |
| Swing Weight Calculated | 361.5 (full-length) |
| Power, RDC | 51.0 |
| Control, RDC | 50.0 |
| Manueverability, RDC | 69.0 |
| Power, Calculated | 2067.9 |
| Head Points | 4.00 |
| Head Weight, % | 48.1 % |
| Center of Percussion | 20.8 |
| Dwell Time, ms | 8.82 |
| Efective Stiffness - lbs | 28.5 |
| K, Lb/In | 166.67 |
| Recoil Weight | 153.88 |
| Twist Weight | 241.58 |
| End Weight | 131.0 |
| Tip Weight | 201.5 |
| 9 O'Clock | 100.9 |
| 3 O'Clock | 102.3 |
| Butt Cap | 128.6 |
| COF, Main | .340 |
| COF, Cross | .366 |
What If?
What if you change string tension (reference) from 57 to 47?
Well, let’s see!
The client wanted to go down to 47 from 57 using the same string and, of course, in the same racquet. Here is what happens:
First, the previous data (57) was explored, and the RDC string bed stiffness was 59 when fresh.
The same racquet at 47 had an RDC string bed stiffness of 45 when fresh. That is a 23.7% decrease in string bed stiffness…fresh v fresh.
However, at the time of this stringing, due to tension loss, the 57 tension setting RDC string bed stiffness was 45, so let’s see how the 47 compares to the “used” string bed stiffness.
The RDC string bed stiffness (fresh) of the 47 is 45! So right now, both racquets have essentially the same string bed stiffness.
This will change, of course; however, if the point is to achieve a “softer” string bed right now, it would require a tension setting of less than 47!
String Shape
How’s the shape of your string?
Is it round, square, hexagonal, octagonal, triangular, or something else?
The string pictured here is square. The dimension across the flat sides is roughly .048 inches/1.22mm, which means the largest dimension is about .063 inches/1.6mm but due to the rounded edges it is less than that. The wear is happening on the “flat” side (.048/1.22),
A flat-sided string shape can create some issues when trying to achieve consistent string tension.
Side View of Fail
Flat Side Wear
String Bed View
This is expected because the string will want to align with the flat side, not the edges. This may cause the string to twist and create added friction when tensioning.
So, we can expect the “edges” to be exposed to the ball, and the “edges can create friction on the ball, which causes rotation!
Yea! How much and for how long is hard to know.
I believe it is safe to say “square” is a good “shape” for your string to be in for polyester monofilaments which we are looking at here.
Solinco Confidential (string)
As you know, Racquet Quest, LLC does not promote polyester string to most tennis players. We do, however, test any racquet string we can. This really helps us understand what happens during play and helps make a better performance selection for the player!
All of the information shown in the table is interesting but the most important data is Power Potential.
We have added three (3) Solinco strings to the Power Potential table, so take a look here
Head Gravity 2023 Team , MP, and Pro Comparison
Moving between several reviews to compare racquets is tiresome, for sure, and inefficient!
We don’t want you to be tired or inefficient, so we include our Three Racquet Comp Data for the new Head Gravity 2023 models!
A word about “dwell time”. To get a more accurate view of the racquet we have elimiiated the player from the “slow” dwell time. This allows us to see excatly what happens when the ball is “dropped” on the string bed without any external force (your swing)!
Head Gravity Pro 2023
Head Gravity Pro 2023
Here comes the new Head Gravity Pro 2023, which brings some good stuff! Like a 100 square inch head with a string pattern of 18×20!
You will see more goodies when you look at the specifications!
This new Gravity Pro has a different “vibe” than last year’s model. Maybe it is the muted graphics!
Hint: Swing Weight=338
You need to try this demo soon! Trust me!
| Manufacturer | Head |
|---|---|
| Racquet Model | Head Gravity Pro 2023 |
| Reference Tension | 53 |
| String | MonoGut ZX Pro (PEEK) |
| Machine Used | True Tension Professional |
| String Bed Stiffness - RDC | 58.0 Units |
| String Bed Stiffness -FlexFour | 66.9 pounds |
| String Bed Stiffness - SBS | 52.4 pounds |
| String Bed Stiffness - ERT | 37 Kg/Cm |
| Racquet Flex, RDC | 64 - After stringing |
| Racquet Flex, FlexFour | 42.5 |
| Racquet - In Plane Stiffness | 467.9 lbs/Inch |
| Weight, Grams | 344 |
| Weight, Ounces | 12.13 |
| Balance, mm | 327 |
| Balance, Inch | 12.87 |
| Length, Cm | 68.6 |
| Length, Inch | 27.03 |
| Head Width | 9.849 |
| Head Length | 12.85 |
| Head Area, cm2 | 643.5 |
| Head Area, Sq. Inch | 99.7 |
| Beam Height @ Grip, mm | 21.2 |
| Beam Height @ Mid, mm | 20.5 |
| Beam Height @ Tip | 20.5 |
| Beam Width @ Grip, mm | 11.3 |
| Beam Width @ Throat, mm | 11.3 |
| Beam Width @ Mid, mm | 11.0 |
| Beam Width @ Tip, mm | 12.5 (includes bumper) |
| Number of Main Strings | 18 |
| Number of Cross Strings | 20 |
| Ratio Cross/Mains | .693 |
| Main String Grid | 7.87 |
| Cross String Grid | 9.75 |
| Density (% of head filled with string) | 71.4% |
| Average Cross String Space | .488 |
| Average Main String Space | .406 |
| Dynamic Tension, Kp, ERT | 37 |
| Dynamic Tension, Lbs/in | 206.94 |
| First Moment, Nm | .867 |
| Polar Moment | 353 |
| Torsional Stability | 15 |
| Swing Weight, Kg/cm2 | 338 |
| Swing Weight, Ounces | 11.92 |
| Swing Weight Calculated | 367.8 |
| Power, RDC | 48 |
| Control, RDC | 52 |
| Manueverability, RDC | 61 |
| Power, Calculated | 2179.2 |
| Head Points | 5.04 |
| Head Weight, % | 47.7% |
| Center of Percussion | 21.0 |
| Dwell Time, ms | 8.35 |
| Efective Stiffness - lbs | 30.4 |
| K, Lb/In | 185.90 |
| Recoil Weight | 163.23 |
| Twist Weight | 251.11 |
| End Weight | 138.2 |
| Tip Weight | 206.0 |
| 9 O'Clock | 104.5 |
| 3 O'Clock | 104.1 |
| Butt Cap | 133.9 |
| COF, Main | .370 |
| COF, Cross | .309 |
Head Gravity Team 2023
The new Head Gravity Team 2023 is last year’s Gravity S, a stellar racquet for many players! The 104 square-inch head fits a particular niche, and the modest stiffness will appeal to many!
The head shape on this 104-inch head is more round and nicely proportioned, which adds to the approachability of this model.
This is a great option if you want something over 100 square inch head!
| Manufacturer | Head |
|---|---|
| Racquet Model | Head Gravity Team 2023 |
| Reference Tension | 53 |
| String | MonoGut ZX Pro (PEEK) |
| Machine Used | True Tension Professional |
| String Bed Stiffness - RDC | 50.0 Units |
| String Bed Stiffness -FlexFour | 58.6 pounds |
| String Bed Stiffness - SBS | 46.0 pounds |
| String Bed Stiffness - ERT | 34 Kg/Cg |
| Racquet Flex, RDC | 60 - After stringing |
| Racquet Flex, FlexFour | 46.0 |
| Racquet - In Plane Stiffness | 394.2 lbs/Inch |
| Weight, Grams | 310 |
| Weight, Ounces | 10.93 |
| Balance, mm | 335 |
| Balance, Inch | 13.23 |
| Length, Cm | 68.6 |
| Length, Inch | 27.03 |
| Head Width | 10.125 |
| Head Length | 13.14 |
| Head Area, cm2 | 674.1 |
| Head Area, Sq. Inch | 104.5 |
| Beam Height @ Grip, mm | 22.5 |
| Beam Height @ Mid, mm | 24.2 |
| Beam Height @ Tip | 24.2 |
| Beam Width @ Grip, mm | 10.8 |
| Beam Width @ Throat, mm | 10.5 |
| Beam Width @ Mid, mm | 11.0 |
| Beam Width @ Tip, mm | 12.2 (includes bumper) |
| Number of Main Strings | 16 |
| Number of Cross Strings | 20 |
| Ratio Cross/Mains | .616 |
| Main String Grid | 7.87 |
| Cross String Grid | 10.50 |
| Density (% of head filled with string) | 75.1% |
| Average Cross String Space | .506 |
| Average Main String Space | .484 |
| Dynamic Tension, Kp, ERT | 34 |
| Dynamic Tension, Lbs/in | 190.16 |
| First Moment, Nm | .809 |
| Polar Moment | 324 |
| Torsional Stability | 16 |
| Swing Weight, Kg/cm2 | 308 |
| Swing Weight, Ounces | 10.86 |
| Swing Weight Calculated | 350.0 |
| Power, RDC | 47 |
| Control, RDC | 55 |
| Manueverability, RDC | 81 |
| Power, Calculated | 1950.2 |
| Head Points | 2.20 |
| Head Weight, % | 49.0% |
| Center of Percussion | 20.5 |
| Dwell Time, ms | 9.00 |
| Efective Stiffness - lbs | 27.3 |
| K, Lb/In | 160.26 |
| Recoil Weight | 137.68 |
| Twist Weight | 236.44 |
| End Weight | 116.9 |
| Tip Weight | 191.3 |
| 9 O'Clock | 96.6 |
| 3 O'Clock | 97.1 |
| Butt Cap | 114.5 |
| COF, Main | .412 |
| COF, Cross | .309 |
Head Gravity MP 2023
Close behind the new Head Radical comes the new Head Gravity 2023! Not one but three (3!). The Gravity Pro, the Gravity MP, and the Gravity Team!
This Gravity MP 2023 demo racquet is ready to hit today! If you have not hit with a Gravity you will be intrigued by the weight distribution.
We are starting with the Gravity MP 2023.
Head Gravity has always used a multi-color graphic package with one color on one side and another color on the other side. This was clever, and many players liked the look.
The new models use a “color-shifting” graphic that you can see here. The colors are subtly different depending on how you look at the racquet.
And the graphic starts at the butt end on one side and starts at the tip on the other! So it has a lot going on.
The racquet is a 100-square-inch head with a fairly thin beam and deep throat shaft.
The string pattern is 16×20, which fills up the hitting area and produces a fairly dense pattern in the center of the racquet. This may contribute to a slightly longer string life.
You may notice the stiffness of this racquet should be perfect for the control component of your game and be very arm friendly (see effective stiffness).
Head Gravity MP 2023
| Manufacturer | Head |
|---|---|
| Racquet Model | Head Gravity MP 2023 |
| Reference Tension | 53 |
| String | MonoGut ZX Pro (PEEK) |
| Machine Used | True Tension Professional |
| String Bed Stiffness - RDC | 50.0 Units |
| String Bed Stiffness -FlexFour | 60.8 pounds |
| String Bed Stiffness - SBS | 49.6 pounds |
| String Bed Stiffness - ERT | 35 Kg/Cm |
| Racquet Flex, RDC | 57 - After stringing |
| Racquet Flex, FlexFour | 39.0 |
| Racquet - In Plane Stiffness | 397.4 lbs/Inch |
| Weight, Grams | 318 |
| Weight, Ounces | 11.22 |
| Balance, mm | 335 |
| Balance, Inch | 13.19 |
| Length, Cm | 68.6 |
| Length, Inch | 27.03 |
| Head Width | 9.91 |
| Head Length | 12.86 |
| Head Area, cm2 | 645.9 |
| Head Area, Sq. Inch | 100.1 |
| Beam Height @ Grip, mm | 21.2 |
| Beam Height @ Mid, mm | 22.5 |
| Beam Height @ Tip | 22.5 |
| Beam Width @ Grip, mm | 10.6 |
| Beam Width @ Throat, mm | 10.6 |
| Beam Width @ Mid, mm | 11.0 |
| Beam Width @ Tip, mm | 12.3 |
| Number of Main Strings | 16 |
| Number of Cross Strings | 20 |
| Ratio Cross/Mains | .617 |
| Main String Grid | 7.70 |
| Cross String Grid | 10.25 |
| Density (% of head filled with string) | 70.0% |
| Average Cross String Space | .515 |
| Average Main String Space | .425 |
| Dynamic Tension, Kp, ERT | 35 |
| Dynamic Tension, Lbs/in | 195.76 |
| First Moment, Nm | .827 |
| Polar Moment | 338 |
| Torsional Stability | 14 |
| Swing Weight, Kg/cm2 | 324 |
| Swing Weight, Ounces | 11.43 |
| Swing Weight Calculated | 356.9 |
| Power, RDC | 46 |
| Control, RDC | 56 |
| Manueverability, RDC | 71 |
| Power, Calculated | 1867.4 |
| Head Points | 2.68 |
| Head Weight, % | 48.8% |
| Center of Percussion | 21.0 |
| Dwell Time, ms | 9.00 |
| Efective Stiffness - lbs | 26.6 |
| K, Lb/In | 160.26 |
| Recoil Weight | 150.77 |
| Twist Weight | 233.27 |
| End Weight | 122.3 |
| Tip Weight | 197.8 |
| 9 O'Clock | 98.9 |
| 3 O'Clock | 99.7 |
| Butt Cap | 119.8 |
| COF, Main | .426 |
| COF, Cross | .378 |
Wilson Pro Staff v14
Wilson Pro Staff 97 v14
Wilson Pro Staff v14
The initial response to the new Wilson Pro Staff 97 v14 graphics pack is similar to the Blade shifting color graphics…you either like it, or you don’t! There seems to be very little “in-between.”
Wilson Pro Staff v14
We care about the racquet’s appearance, but we really care about the specifications!
So here we go…
| Manufacturer | Wilson |
|---|---|
| Racquet Model | Wilson Pro Staff 97 v14 |
| Reference Tension | 55 |
| String | PEEK 1.25mm |
| Machine Used | True Tension Professional |
| String Bed Stiffness - RDC | 51.0 Units |
| String Bed Stiffness -FlexFour | 64.1 pounds |
| String Bed Stiffness - SBS | 49.0 pounds |
| String Bed Stiffness - ERT | 34 Kg/Cm |
| Racquet Flex, RDC | 66 - After stringing |
| Racquet Flex, FlexFour | 49.0 |
| Racquet - In Plane Stiffness | 447.2 lbs/Inch |
| Weight, Grams | 330 |
| Weight, Ounces | 11.64 |
| Balance, mm | 324 |
| Balance, Inch | 12.76 |
| Length, Cm | 68.57 |
| Length, Inch | 27.00 |
| Head Width | 9.438 |
| Head Length | 12.80 |
| Head Area, cm2 | 623.0 |
| Head Area, Sq. Inch | 94.9 |
| Beam Height @ Grip, mm | 21.0 |
| Beam Height @ Mid, mm | 21.8 |
| Beam Height @ Tip | 21.8 |
| Beam Width @ Grip, mm | 11.1 |
| Beam Width @ Throat, mm | 11.0 |
| Beam Width @ Mid, mm | 11.0 |
| Beam Width @ Tip, mm | 12.8 (includes bumper guard) |
| Number of Main Strings | 16 |
| Number of Cross Strings | 19 |
| Ratio Cross/Mains | .621 |
| Main String Grid | 7.25 |
| Cross String Grid | 10.13 |
| Density (% of head filled with string) | 77.4% |
| Average Cross String Space | .533 |
| Average Main String Space | .453 |
| Dynamic Tension, Kp, ERT | 34 |
| Dynamic Tension, Lbs/in | 190.16 |
| First Moment, Nm | .822 |
| Polar Moment | 336 |
| Torsional Stability | 14 |
| Swing Weight, Kg/cm2 | 322 |
| Swing Weight, Ounces | 11.36 |
| Swing Weight Calculated | 346.4 |
| Power, RDC | 53 |
| Control, RDC | 47 |
| Manueverability, RDC | 72 |
| Power, Calculated | 2036.6 |
| Head Points | 5.98 |
| Head Weight, % | 47.2% |
| Center of Percussion | 21.1 |
| Dwell Time, ms | 8.91 |
| Efective Stiffness - lbs | 28.8 |
| K, Lb/In | 163.46 |
| Recoil Weight | 158.78 |
| Twist Weight | 220.98 |
| End Weight | 134.0 |
| Tip Weight | 195.9 |
| 9 O'Clock | 100.8 |
| 3 O'Clock | 100.5 |
| Butt Cap | 128.1 |
| COF, Main | .323 |
| COF, Cross | .323 |
Numbers, numbers, numbers! What do they mean?
With each of our racquet reviews a long list of numbers is included. It has been a few years since we explained what these numbers mean so here it is;
| Manufacturer | Head |
|---|---|
| Racquet Model | Head Radical MP 2023 |
| Reference Tension | 55 (what you tell the stingers to set the stringing machine). This should be replaced by String Bed Stiffness (SBS) |
| String | MonoGut ZX Pro |
| Machine Used | True Tension Professional |
| String Bed Stiffness - RDC | 53.0 Units (Babolat RDC) |
| String Bed Stiffness -FlexFour | 64.9 pounds (Flex Four) |
| String Bed Stiffness - SBS | 51.8 pounds (Racquet Quest string bed stiffness SBS Master) |
| String Bed Stiffness - ERT | 35 Kg/Cm (previously Beer's ERT1000) |
| Racquet Flex, Babolat RDC | 65 - After stringing (unstrung racquets will be slightly stiffer. Loaded from the tip) |
| Racquet Flex, FlexFour | 44.5 (Loaded from the COP) |
| Racquet - In Plane Stiffness | 379.7 lbs/Inch (stiffness across the 3 ad 9 o'clock positions of the racquet head) |
| Weight, Grams | 326 |
| Weight, Ounces | 11.50 |
| Balance, mm | 333 |
| Balance, Inch | 13.11 |
| Length, Cm | 68.57 |
| Length, Inch | 27.00 |
| Head Width | 9.63 |
| Head Length | 12.79 |
| Head Area, cm2 | 623.0 |
| Head Area, Sq. Inch | 96.7 |
| Beam Height @ Grip, mm | 21.0 (how thick the racquet is looking at the side) |
| Beam Height @ Mid, mm | 22.5 (how thick the racquet is looking at the side) |
| Beam Height @ Tip | 20.5 (how thick the racquet is looking at the side) |
| Beam Width @ Grip, mm | 12.5 (how thick the racquet is looking at the front or face view) |
| Beam Width @ Throat, mm | 11.5 (how thick the racquet is looking at the front or face view) |
| Beam Width @ Mid, mm | 12.8 (how thick the racquet is looking at the front or face view) |
| Beam Width @ Tip, mm | 12.8 (how thick the racquet is looking at the front or face view) |
| Number of Main Strings | 16 |
| Number of Cross Strings | 19 |
| Ratio Cross/Mains | .634 ( typically the natural ratio) |
| Main String Grid | 7.18 (the distance between the two outer most main strings) |
| Cross String Grid | 9.44 (the distance between the two outer most cross strings) |
| Density (% of head filled with string) | 69.6% (how much of the head area is filled with string) |
| Average Cross String Space | .494 (how far apart the strings are). The farther apart the quicker the wear. |
| Average Main String Space | .449 (how far apart the strings are). The farther apart the quicker the wear. |
| Dynamic Tension, Kp, ERT | 35 (string bed stiffness in kilos per centimeter) |
| Dynamic Tension, Lbs/in | 195.76 (DT converted to pounds per inch) |
| First Moment, Nm | .841 (sometimes called pickup weight) |
| Polar Moment | 347 (torsional weight) |
| Torsional Stability | 16 ( resistance to twisting on off center hits) |
| Swing Weight, Kg/cm2 | 331 (the dynamic weight and the most significant property) |
| Swing Weight, Ounces | 11.68 |
| Swing Weight Calculated | 361.5 (calculated from the butt end to the tip) |
| Power, RDC | 52 (property calculated by Babolat RDC) |
| Control, RDC | 49 (property calculated by Babolat RDC) |
| Manueverability, RDC | 66 (property calculated by Babolat RDC) |
| Power, Calculated | 2101.4 (calculation based on several racquet properties) |
| Head Points | 3.15 ( a point is generally consider to be .125 inches/3.18mm) |
| Head Weight, % | 48.5% |
| Center of Percussion | 21.1 (highest COR) |
| Dwell Time, ms | 8.74 (length of time the ball is in contact with the string without a swing) |
| Efective Stiffness - lbs | 29.2 ( the calculated combined stiffness of the racquet and sting bed) |
| K, Lb/In | 169.87 (string bed stiffness in pounds/inch) |
| Recoil Weight | 156.44 (resistance to twisting about the grip) |
| Twist Weight | 226.48 (resistance to twisting about the neutral axis) |
| End Weight | 126.0 (two scale system to calculate CG) |
| Tip Weight | 197.7 (two scale system to calculate CG) |
| 9 O'Clock | 105.1 (three scale system to assure symmetry) |
| 3 O'Clock | 104.7(three scale system to assure symmetry) |
| Butt Cap | 115.6 (three scale system to assure symmetry) |
| COF, Main | .416 (the stickiness of the string bed sliding the ball with the main strings) |
| COF, Cross | .388(the stickiness of the string bed sliding the ball with the cross strings) |
What is wrong with this picture?
Actually, it is going to be two (2) pictures! One with no narrative and one with an explanation of what is wrong!
Did you see what was wrong with this picture? If you did, congratulations are in order!
If you didn’t know what was wrong with this picture, here it is! If you receive a freshly strung racquet that looks like this, take a close look at the strings and do not accept it if there is a “mis-weave” in the string bed!
Sometimes this condition is not easy to spot, so take a good look.
Some Time Off!
We are taking a few days off!
We are spending some time with one of our daughters and grandson…finally!
Thank you!
Head Radical MP 2023
You have seen the pretty pictures; now see the specs of this new Radical series!
We are starting our property review with the Head Radical MP 2023. The MP version will probably be the most popular due to the very lovely weight and “player” style head size of 98 inches!
Head Radical MP 2023
As you look at the following specifications you may notice the addition of some “numbers”, specifically “beam width”.
We have been taking this number for many years but now believe it is time to expose it to you, the readers.
Briefly, the beam height-to-width ratio contributes to in-plane stiffness which is important for consistent string bed stiffness (SBS).
| Manufacturer | Head |
|---|---|
| Racquet Model | Head Radical MP 2023 |
| Reference Tension | 55 |
| String | MonoGut ZX Pro |
| Machine Used | True Tension Professional |
| String Bed Stiffness - RDC | 53.0 Units |
| String Bed Stiffness -FlexFour | 64.9 pounds |
| String Bed Stiffness - SBS | 51.8 pounds |
| String Bed Stiffness - ERT | 35 Kg/Cm |
| Racquet Flex, RDC | 65 - After stringing |
| Racquet Flex, FlexFour | 44.5 |
| Racquet - In Plane Stiffness | 379.7 lbs/Inch |
| Weight, Grams | 326 |
| Weight, Ounces | 11.50 |
| Balance, mm | 333 |
| Balance, Inch | 13.11 |
| Length, Cm | 68.57 |
| Length, Inch | 27.00 |
| Head Width | 9.63 |
| Head Length | 12.79 |
| Head Area, cm2 | 623.0 |
| Head Area, Sq. Inch | 96.7 |
| Beam Height @ Grip, mm | 21.0 |
| Beam Height @ Mid, mm | 22.5 |
| Beam Height @ Tip | 20.5 |
| Beam Width @ Grip, mm | 12.5 |
| Beam Width @ Throat, mm | 11.5 |
| Beam Width @ Mid, mm | 12.8 |
| Beam Width @ Tip, mm | 12.8 |
| Number of Main Strings | 16 |
| Number of Cross Strings | 19 |
| Ratio Cross/Mains | .634 |
| Main String Grid | 7.18 |
| Cross String Grid | 9.44 |
| Density (% of head filled with string) | 69.6% |
| Average Cross String Space | .494 |
| Average Main String Space | .449 |
| Dynamic Tension, Kp, ERT | 35 |
| Dynamic Tension, Lbs/in | 195.76 |
| First Moment, Nm | .841 |
| Polar Moment | 347 |
| Torsional Stability | 16 |
| Swing Weight, Kg/cm2 | 331 |
| Swing Weight, Ounces | 11.68 |
| Swing Weight Calculated | 361.5 |
| Power, RDC | 52 |
| Control, RDC | 49 |
| Manueverability, RDC | 66 |
| Power, Calculated | 2101.4 |
| Head Points | 3.15 |
| Head Weight, % | 48.5% |
| Center of Percussion | 21.1 |
| Dwell Time, ms | 8.74 |
| Efective Stiffness - lbs | 29.2 |
| K, Lb/In | 169.87 |
| Recoil Weight | 156.44 |
| Twist Weight | 226.48 |
| End Weight | 126.0 |
| Tip Weight | 197.7 |
| 9 O'Clock | 105.1 |
| 3 O'Clock | 104.7 |
| Butt Cap | 115.6 |
| COF, Main | .416 |
| COF, Cross | .388 |
Head…just when you thought it couldn’t get any better
The Head Radical has always been one of the best performance racquets available and doesn’t require much in the way of annual changes!
We think this new group is right on target! Adding Auxetic in the throat brings this series into the overall success of the Auxetic component!
We will be doing full reviews very soon, but in the meantime, take a look at these new Radicals!
The Team is the new “S” in the Radical Series! Based on our initial testing, we think this model has a trick up its sleeve!
Clamp Riser…your friend!
The Clamp Riser eliminates the need to pull two main strings to start a string job! There is really no need to use that procedure.
Sold as a set of 2. Can be used at a 20mm or 30mm rise depending on rotation.
1⃝ Any stringing machine with long, rotating string clamps is too low to capture the string properly for the first tension pull. The Clamp Riser fits under the clamp and raises it!
2⃝ The clamp holds the string securely at the proper height for the first pull, one string at a time!
Simply rotate the clamp riser depending on whether you need 20mm of height or 30mm.
We have found that Baiardo prefers the 30mm height, as seen here. The riser height must be enough to allow the clamp base to “lock”.
Charges for shipping outside the US will be added to the total cost minus the US shipping charge.
The Same but Different!
How can two totally different things be the same in so many ways?
Here is a good example:
Wilson Sensation 16, natural v Wilson Sensation Plus 17, black.
Same but Different!
Looking a the stress/strain portion of the graph, it is nearly impossible to see any difference!
Both strings exhibit good elongation and elasticity.
Finally, when it comes to UTS the Sensation is a little stronger, as you would expect, for a 1.33mm string.
The Sensation Plus measures 1.26mm! So, the UTS is pretty good!
If you have been using Sensation but would like a black, thin string from Wilson simply use Sensation Plus!
ZUS Tennis
Never heard of them? I hadn’t either until yesterday!
ZUS is a Chicago-based company that offers several racquets with various specifications available.
A ZUS Custom Sven Goth Design came in for work, so we had a great opportunity to get all of the specifications and include them in a “racquet review”!
First, the racquet seems to be a well-made version of the Wilson Pro Staff RF, with an ever so slightly thinner modified box section beam. the geometry is very much like the Wilson Pro Staff RF, as is the weight.
This racquet has a bunch of weight at the rear end, plus a shrink sleeve to increase the grip size, so it is loaded up with weight down there, which is OK!
Rear Weight
The racquet is foamed, probably the entire tube, which may contribute a more muted feel than a non-foamed racquet. The Pro Staff RF is also foam filled.
The small oval piece is a lead or steel, weight sandwiched between the two halves of the shaft. This construction makes it impossible to remove that weight if you want to, but it is good to have it there!
| Manufacturer | ZUS |
|---|---|
| Racquet Model | ZUS Custom Sven Goth Design |
| Reference Tension | 50 |
| String | Prince Tour XR 16 |
| Machine Used | True Tension Professional |
| String Bed Stiffness - RDC | 53.0 Units |
| String Bed Stiffness -FlexFour | 59.1 pounds |
| String Bed Stiffness - SBS | 50.6 pounds |
| String Bed Stiffness - ERT | 35 Kg/Cm |
| Racquet Flex, RDC | 63 - After stringing |
| Racquet Flex, FlexFour | 41.0 |
| Racquet - In Plane Stiffness | 438.0 lbs/Inch |
| Weight, Grams | 354 |
| Weight, Ounces | 12.49 |
| Balance, mm | 316 |
| Balance, Inch | 12.44 |
| Length, Cm | 68.57 |
| Length, Inch | 27.00 |
| Head Width | 9.41 |
| Head Length | 12.80 |
| Head Area, cm2 | 610.1 |
| Head Area, Sq. Inch | 94.6 |
| Beam Height @ Grip, mm | 20.5 |
| Beam Height @ Mid, mm | 20.2 |
| Beam Height @ Tip | 20.6 |
| Beam Width @ Grip, mm | 10.8 |
| Beam Width @ Throat, mm | 10.8 |
| Beam Width @ Mid, mm | 11.6 |
| Beam Width @ Tip, mm | 12.4 |
| Number of Main Strings | 16 |
| Number of Cross Strings | 19 |
| Ratio Cross/Mains | .619 |
| Main String Grid | 7.25 |
| Cross String Grid | 9.68 |
| Density (% of head filled with string) | .742 |
| Average Cross String Space | .509 |
| Average Main String Space | .453 |
| Dynamic Tension, Kp, ERT | 35 |
| Dynamic Tension, Lbs/in | 195.76 |
| First Moment, Nm | .854 |
| Polar Moment | 348 |
| Torsional Stability | 18 |
| Swing Weight, Kg/cm2 | 330 |
| Swing Weight, Ounces | 11.64 |
| Swing Weight Calculated | 353.5 |
| Power, RDC | 51 |
| Control, RDC | 49 |
| Manueverability, RDC | 67 |
| Power, Calculated | 1965.9 |
| Head Points | 8.46 |
| Head Weight, % | 46.1% |
| Center of Percussion | 20.9 |
| Dwell Time, ms | 8.74 |
| Efective Stiffness - lbs | 28.8 |
| K, Lb/In | 169.87 |
| Recoil Weight | 167.26 |
| Twist Weight | 235.57 |
| End Weight | 151.7 |
| Tip Weight | 197.9 |
| 9 O'Clock | 105.5 |
| 3 O'Clock | 108.1 |
| Butt Cap | 137.1 |
| COF, Main | .382 |
| COF, Cross | .306 |
Surprise, surprise!
In all of my many years of tennis racquet work, two things happened this very month that I have never seen before!
How can this happen? One surprise is amazing, but two?
You can click here to read about “Failure by Fruit”
You can click here to read about the “ZUS tennis racquet” and see some specs so you will be really informed!
We wonder what surprises are waiting for us!
Don’t be Beanie-less!
RQ Beanies!
Bag your beanie at Racquet Quest World Headquarters while supplies last. These are awesome!
Don’t be without a beanie for your chilly early morning tennis that is coming soon! Yes, even in Florida!
If you can’t stop by the World Headquarters we can send it. Just tell us where!
Bag a Beanie!
My chat with Oscar!
It is a rare opportunity to chat with one of the greatest basketball players of all time! I am happy to share our conversation with all of you on our Racquet Quest Podcast!
Our podcast is available on Apple, Spotify, YouTube, and Twitter, or you can simply click the episode on the left side of the home page and listen without going anywhere!
This is a really fun conversation, and I hope you will listen and comment if you want.
Thank you, Oscar, for sharing, and thank you, Tia, for bringing us together!
Failure by Fruit!
Tennis strings fail for several reasons… but fruit!
I have been doing tennis racquet work for many years. However, this is a first for me!
Failure by Fruit
So what actually happened here? This player carries everything she needs to compete at tournaments, including fruit. In this case, it was bananas!
Well, bananas don’t last long, and these decided to go and take some very good sting with them!
The racquets were placed in the bag and remained there while the bananas did what bananas do…go bad!
Apparently, where the bananas contacted the string, the chemicals in the decomposing banana were enough to eat the string in not one but two racquets!
So, if you are considering sharing your bag with bananas, be sure they are separated from the racquets!
We are preparing to work on these racquets, and I can say they do smell good!
Solinco Black Out 300XTD
Solinco is not new to the tennis racquet business but the new offerings have some excellent features that I don’t remember on the previous ones we saw.
The two (2) racquets being reviewed are the Black Out 300XTD and White Out 305 XTD
Solinco Black Out
Cleverly, one is all black and one is all white! I mention this because the graphics are minimal which I think is a very good design platform.
We will start the review with the Black Out. As you might have guessed the 300XTD is a 300-gram, 27.5-inch-long racquet having a 100-square-inch hitting area.
This racquet comes with three (3) butt caps for adding much-needed weight! Pop out the 0-gram standard and pop in a 5 or 10-gram replacement! When you pop out the butt cap you will see this is a non-filled (hollow) racquet, and, there is nothing wrong with that. You will also see that the grip pallet is a molded foam pallet, allowing for minor size and shape changes.
That is enough narrative. Take a look at the specifications below:
| Manufacturer | Solinco |
|---|---|
| Racquet Model | Solinco Black Out 300XTD |
| Reference Tension | 42 |
| String | Volkl V-Star 18 |
| Machine Used | True Tension Professional |
| String Bed Stiffness - RDC | 42.0 Units |
| String Bed Stiffness -FlexFour | 39.0 pounds |
| String Bed Stiffness - SBS | 41.3 pounds |
| String Bed Stiffness - ERT | 28 Kg/Cm |
| Racquet Flex, RDC | 70 - After stringing |
| Racquet Flex, FlexFour | 49.0 |
| Racquet - In Plane Stiffness | 377.4 lbs/Inch |
| Weight, Grams | 330 |
| Weight, Ounces | 11.64 |
| Balance, mm | 323 |
| Balance, Inch | 12.72 |
| Length, Cm | 69.9 |
| Length, Inch | 27.52 |
| Head Width | 9.81 |
| Head Length | 12.98 |
| Head Area, cm2 | 645.3 |
| Head Area, Sq. Inch | 100.0 |
| Beam Height @ Grip, mm | 23.3 |
| Beam Height @ Mid, mm | 24.5 |
| Beam Height @ Tip | 23.7 |
| Beam Width @ Grip, mm | 16.0 |
| Beam Width @ Throat, mm | 15.7 |
| Beam Width @ Mid, mm | 11.0 |
| Beam Width @ Tip, mm | 12.8 |
| Number of Main Strings | 16 |
| Number of Cross Strings | 19 |
| Ratio Cross/Mains | .637 |
| Main String Grid | 7.70 |
| Cross String Grid | 10.68 |
| Density (% of head filled with string) | .822 |
| Average Cross String Space | .562 |
| Average Main String Space | .481 |
| Dynamic Tension, Kp, ERT | 30 |
| Dynamic Tension, Lbs/in | 167.79 |
| First Moment, Nm | .819 |
| Polar Moment | 332 |
| Torsional Stability | 15 |
| Swing Weight, Kg/cm2 | 317 |
| Swing Weight, Ounces | 11.18 |
| Swing Weight Calculated | 344.3 |
| Power, RDC | 60 |
| Control, RDC | 36 |
| Manueverability, RDC | 75 |
| Power, Calculated | 2330.5 |
| Head Points | 8.35 |
| Head Weight, % | 46.2% |
| Center of Percussion | 20.9 |
| Dwell Time, ms | 10.19 |
| Efective Stiffness - lbs | 25.0 |
| K, Lb/In | 125.00 |
| Recoil Weight | 155.24 |
| Twist Weight | 237.60 |
| End Weight | 136.4 |
| Tip Weight | 192.7 |
| 9 O'Clock | 100.4 |
| 3 O'Clock | 101.3 |
| Butt Cap | 127.5 |
| COF, Main | .370 |
| COF, Cross | .332 |
Solinco White Out 305XTD
Solinco is not new to the tennis racquet space but this model is a much better effort than the ones we have seen previously.
Solinco White Out
This White Out 305XTD is a 305-gram, 27 ½ long, 98-square-inch hitting area, thin beam racquet, that happens to be foam filled. The White Out is basically white…which is very good! The grip pallet is a molded foam format that will allow minor size and shape modifications.
The standard butt cap can be replaced with a 5 or 10-gram unit for needed weight.
We have added the beam height and beam width to the specification sheet. Beam height is the thickness of the racquet when looking a the side and beam width is the thickness of the racquet when looking at the face.
Take a look at all the specifications:
| Manufacturer | Solinco |
|---|---|
| Racquet Model | Solinco White Out 305XTD |
| Reference Tension | 42 |
| String | Volkl V-Star 18 |
| Machine Used | True Tension Professional |
| ASPS, RDC | 39.0 |
| ASPS, FlexFour | 50.5 |
| Racquet Flex, RDC | 67 - After stringing |
| Racquet Flex, FlexFour | 50.0 |
| Racquet - In Plane Stiffness | 350.9 lbs/Inch |
| Weight, Grams | 330 |
| Weight, Ounces | 11.64 |
| Balance, mm | 323 |
| Balance, Inch | 12.72 |
| Length, Cm | 69.9 |
| Length, Inch | 27.52 |
| Head Width | 9.62 |
| Head Length | 12.95 |
| Head Area, cm2 | 631.5 |
| Head Area, Sq. Inch | 97.9 |
| Beam Height @ Grip, mm | 22.0 |
| Beam Height @ Mid, mm | 22.0 |
| Beam Height @ Tip | 22.3 |
| Beam Width @ Grip, mm | 11.6 |
| Beam Width @ Throat, mm | 13.0 |
| Beam Width @ Mid, mm | 10.8 |
| Beam Width @ Tip, mm | 12.5 |
| Number of Main Strings | 16 |
| Number of Cross Strings | 19 |
| Ratio Cross/Mains | .626 |
| Main String Grid | 7.70 |
| Cross String Grid | 10.56 |
| Density (% of head filled with string) | .831 |
| Average Cross String Space | .556 |
| Average Main String Space | .481 |
| Dynamic Tension, Kp, ERT | 30 |
| Dynamic Tension, Lbs/in | 167.79 |
| First Moment, Nm | .819 |
| Polar Moment | 334 |
| Torsional Stability | 14 |
| Swing Weight, Kg/cm2 | 320 |
| Swing Weight, Ounces | 11.29 |
| Swing Weight Calculated | 344.3 |
| Power, RDC | 57 |
| Control, RDC | 40 |
| Manueverability, RDC | 73 |
| Power, Calculated | 2203.6 |
| Head Points | 8.35 |
| Head Weight, % | 46.2% |
| Center of Percussion | 21.1 |
| Dwell Time, ms | 10.19 |
| Efective Stiffness - lbs | 24.7 |
| K, Lb/In | 125.00 |
| Recoil Weight | 158.24 |
| Twist Weight | 229.13 |
| End Weight | 100.1 |
| Tip Weight | 191.2 |
| 9 O'Clock | 100.1 |
| 3 O'Clock | 100.6 |
| Butt Cap | 128.4 |
| COF, Main | .362 |
| COF, Cross | .300 |
Comparing Racquets (for real)
The Racquet Quest podcast recently aired a session on comparing racquets, so, to be fair I wanted to post that same data here. If you listened to the podcast this will sound familiar.
These racquets are not random. These racquets are owned by a client that is seeking an upgrade without going overboard!
Here is what Jess has to say:
“Hey, John –
Jess definitely likes the VS more than the Rafa. She said that she gets more easy power and stability with the Rafa but she’s able to accelerate faster on the forehand side with the VS.
She also felt like the VS was more maneuverable at the net. She said that if she’s in control of the point that she can really whip her forehand for a winner. She definitely noticed the lighter swing weight and liked that.
However, she also said that sometimes it feels a little unstable – like the VS is getting pushed around a bit. For example, she noticed that the head of the racquet can twist sometimes if her opponent nails a hard ball at her.
She has more control for sure with the VS – felt like she blasted more balls out with the Rafa. Overall, she likes the racquet- just would like a little more stability.”
By the way, Jess had not seen the racquet data prior to her hitting. So, there you have it. I believe you can see how much numbers help us find the right performance characteristics for a racquet.
Let’s Compare
We publish many racquet reviews that include comprehensive data to be used to speed up the selection process for players looking to review racquets and possibly demo them.
We thought it might be fun to do a little comparison of racquets in a simple format and we are starting with this one!
When considering racquets there is one “weight” that outweighs them all and that is swing weight! Swing weight is also described as inertia which is, in our discussions, the term used to describe the momentum of a tennis racquet. Once it gets going it does not want to stop which equals power (sort of F=MA)
We will be adding groups of three (3) racquets whenever possible and when new racquets are introduced.
Our Questron in Action!
As you know, Racquet Quest is a data-driven business, and data requires numbers. To generate those numbers, we have designed and built several devices.
One device is the Questron!
The Questron is used to test every string we receive, and the data is compiled to understand where that particular string fits.
So, instead of talking about it we have included a short video!
Thank you for watching our Questron in Action! If you have a question, or a particular string of interest, please let us know. We may have already taken the data! On GASP.network there are many graphs of previous tests. GASP.network is a membership ($40.00 one time) site.
Are Last Years Racquets Worth…Less?
It happens every year.
You know, introducing “new and Improved” tennis racquet(s)! Not one, but many!
How much better can they be? Make no mistake, new materials are always available, and those can be beneficial to the properties of a tennis racquet; however, in my opinion, and history, most of those properties will not be a significant “positive” to the player, and in some cases may be less than “desirable”.
So are last year’s racquets worthless? Absolutely not!
To make room at retail for the new racquets, last year’s models are substantially reduced. Sometimes to an unreasonably low price for the product! This is “good news” for manufacturers and online giants but not necessarily for your local tennis specialty shop. So what, you say!
This is “what”
From what we see at the World Headquarters of Racquet Quest, the online and other non-tennis specific outlets’ preparation of the racquet(s) may be sub-standard, and in fact, sometimes the racquets are not the desired model (another story for another time). We don’t believe this is intentional, but it does create issues for the purchaser and maybe the seller.
The business model of Racquet Quest has always been to provide the very best preparation for every tennis racquet! We recognize that players want the best possible deal on everything purchased. However, we keep a supply of outstanding tennis racquets that are best sellers of last year, and maybe two years ago! These racquets will not be relegated to the scrap heap, nor will they be “given away”! They are valuable!
Of course, our “full custom” racquets are always available for those demanding the very best and are willing to invest what it takes to get there! It may be less than you think, and it may be a racquet that is not a “current” model.
All we ask is that you take the time to confirm what you intend to get and that you consider using your local tennis specialty shop for preparation!
Thank you!
Wondering about the ThermoPen ONE?
If you were wondering why the ThermopPen ONE was on this site I don’t blame you! I was surprised to see it there myself!
Here is why…
A good client and friend is in the food supply service and we are constantly talking about food and string! He used VS Touch by the way. Anyway, I asked about a food thermometer and he recommended this one, and I went to the ThermPen site while working on this one.
String Savers
String savers are on my mind today for several reasons so I thought I would post something about them that may be of interest. Let’s see!
String Savers are tiny little pieces of material that are “grooved” to cradle the string and provide a tiny barrier between rubbing strings, therefore creating a longer, happier life!
String Savers are normally used when stringing your tennis racquet with natural gut string to help the $75.00 job last longer.
But what else do string savers do?
Well, in the case we see here it increases the swing weight from 332 to 341! So 286 of these tiny things have an impact on swing weight!
Probably the typical reaction would be an increase in string bed stiffness but that is not the case, plus the string bed stiffness is ever-changing anyway.
Searching for something?
The Racquet Quest website has always had a “search” function. However, you may not know where it is!
I didn’t because I usually don’t search from the “home” page.
To search the entire site for any word, go to the “Search RQ” field on the left side of the page, not too far from the top.
Type in what you are looking for, and soon you will have the content you want!
String Frequency Calculator on your iOS or Android Phone!
We are happy to announce our popular SFC application can now be carried around on your phone and tablet!
String Frequency Calculator
Scan this QR code, and the application will be on your phone whenever you need to know when to string your racquet!
If you are not demanding peak performance for your game right now, you can eliminate your “player style,” which will increase the time between suggested stringing.
The current “player styles” are beg, rec, club, and tour.
A “tour” player would want peak performance, but it is also essential that we, at any level, should expect our string to help us!
The “Value/Playability ratio is subjective (a little) but it places a value on the enjoyment, and comfort, and we know that playing with Natural Gut is more enjoyable than polyester, therefore the favorable ratio.
Our String Frequency Calculator application will help us enjoy tennis more, knowing that we maximize the racquet!
The Racquet Quest ‘String Frequency Calculator’ app as well as other apps we plan on releasing in the near future, are hosted by and available free to users via our partner “Open as App”.
Steps to download and use our free apps:
- When you scan our app QR code, you will be prompted to download the Open as App iOS or Android app to your device and create an account. Alternatively, you can simply sign in using your Microsoft 365, Google, or Apple account.
- You will then see the app you scanned a QR code for in Open as App.
- Once you open the String Frequency Calculator app within Open as App, you will be able to add it to your iOS or Android home screen, avoiding having to open Open as App every time to access our apps.
To do so, follow the simple steps explained below:
- Open on your phone the mobile application “Open as App”
- Tap on the app of interest (eg. “Stringing Frequency Calculator”)
- Tap on the three vertical dots at the top-right of the screen
- Tap “Add to Home screen”
- Confirm by tapping “Add”
- Done! You should now see the application directly on the home screen of your device!
Congratulations, Mustangs!
The New Washington Mustangs tennis has grown from five (5) to twelve (12) players in just one year! Fantastic!
New Washington Mustangs
The team is playing Jeffersonville in the Sectionals which will be a tough match! The Mustangs #! Doubles won their conference so don’t be surprised at how well they do against anyone!
The only name I know in the picture is Rafael, the coach on the left. Rafael moved from Florida to Indiana and took his love of tennis with him! It looks like his team is poised to do great things!
Maybe we will see them at the USTA Campus sometime!
Way to go team!
SBS Update
We have gone through our string bed stiffness device (SBS) and are nearly settled on the final design! We have been using this device for several months, and we are very excited!
As discussed before, Racquet Quest, LLC believes string bed stiffness is the most efficient and accurate way to communicate how we want our racquet to feel…not reference tension!
We are on this mission for that reason!
There have been, and still are, several devices that are used for that, but what is needed is a player, coach, technician, and supplier consortium to make it happen!
The device will be 100% mechanical, light and fit in a tennis bag, easy and fun to use, and accurate! That is a lot to ask from a single device, but I think we have achieved it!
Oh, yes, it must be financially acceptable to every tennis player, which it will be!
The first pre-production units may be available for testing before general release.
We Need You!
Please take a minute to select either “Yes” or “No” and submit the following form. Your participation is important!
Congratulations, Redbug Topspinners!
Redbug Topspinners
A big Thank You to your Captain, Reggie, for sharing this news with us!
We are anxious to hear how you do in the new season so please keep us informed!
Good luck!
The Elephant in the Room!
I suspect we all have heard that expression!
It means there is something that everyone tries to ignore, but it is too large to do so!
I recently read an article in Racquet Sports Industries authored by Georgetta L. Morque. The title is “Tackling Tennis Elbow.” Tennis elbow is an important topic and deserves much attention. Georgetta is writing about ways to mitigate tennis elbow after the fact.
Let’s try to prevent tennis elbow, so it does not need to be treated!
When we say stiff, it means a string with less than 4% elongation at 60 pounds which is our testing parameter. Most strings, and for this discussion, strings exhibiting that property will be monofilament PET-based (polyester).
Fully understanding this required a lot of testing, both lab and play, for many playing styles and racquets. To make a long story short, as a racquet technologies business, we decided not to promote polyester strings for most players. That sounds silly, but why take a chance when you don’t have to!
Our success is based on helping you, the player, perform the best you can, so it does not make sense to promote something contrary to that philosophy. Probably 75% of our clients have come to us for something different, so we have a “head start.”
So why do so many players use it or want to use it?
We believe it is because they have not been exposed to alternative string materials. Some outstanding players at the pro level use it, so it must be good, and it is for about 10-11 games. Of course, manufacturers and marketers of polyester string stand to make a nice profit! It is in their best interest to promote products by adding some terminology and material to make the string less stiff.
A polyester string is deficient in power and needs to be walloped, and the harder it is hit, the stiffer it becomes, which is the problem. Developing bodies can’t tolerate that level of impact for long.
Head Boom Team L 2022
Like the Head Boom Team 2022, the Head Team L 2022 has been much anticipated!
Finally, a 107 square inch head without the ridiculous thick beam and ultra-lightweight, a legitimate “tweener”!
The Boom Team L has the highest power level assigned to recent Head racquets coming in at “900”, compared to the Boom Team at 800 and the Boom Pro at 400. If a power racquet is what you are looking for, this may be a good choice!
The Boom Team L is a slightly longer racquet at 27.35 inches. This increase in length increases the swing weight without adding weight. You can think of swing weight as “leverage.”
The Boom Team L incorporates all the newest materials and design chops of the viral Boom Pro and Boom MP.
The specifications will give you a better idea of where this racquet may fit your game.
| Manufacturer | Head |
|---|---|
| Racquet Model | Head Boom Team L 2022 |
| Reference Tension | 56 lbs - 25.4 kg |
| String | Head Reflex MLT 17 |
| Machine Used | True Tension Professional |
| ASPS, RDC | 45.0 |
| ASPS, FlexFour | 55.0 |
| Racquet Flex, RDC | 63 - After stringing |
| Racquet Flex, FlexFour | 46.0 |
| Racquet - In Plane Stiffness | 339.8 lbs/Inch |
| Weight, Grams | 290 |
| Weight, Ounces | 10.23 |
| Balance, mm | 353 |
| Balance, Inch | 13.90 |
| Length, Cm | 69.5 |
| Length, Inch | 27.362 |
| Head Width | 10.15 |
| Head Length | 13.25 |
| Head Area, cm2 | 679.5 |
| Head Area, Sq. Inch | 105.6 |
| Number of Main Strings | 16 |
| Number of Cross Strings | 19 |
| Ratio Cross/Mains | .643 |
| Main String Grid | 7.90 |
| Cross String Grid | 10.56 |
| Density (% of head filled with string) | .792 |
| Average Cross String Space | .556 |
| Average Main String Space | .494 |
| Dynamic Tension, Kp, ERT | 31 |
| Dynamic Tension, Lbs/in | 173.39 |
| First Moment, Nm | .805 |
| Polar Moment | 331 |
| Torsional Stability | 18 |
| Swing Weight, Kg/cm2 | 313 |
| Swing Weight, Ounces | 11.04 |
| Swing Weight Calculated | 361.4 |
| Power, RDC | 53 |
| Control, RDC | 48 |
| Manueverability, RDC | 78 |
| Power, Calculated | 2139.2 |
| Head Points | -1.73 |
| Head Weight, % | 50.8% |
| Center of Percussion | 20.7 |
| Dwell Time, ms | 9.48 |
| Efective Stiffness - lbs | 26.3 |
| K, Lb/In | 144.23 |
| Recoil Weight | 129.71 |
| Twist Weight | 221.11 |
| End Weight | 97.7 |
| Tip Weight | 192.3 |
| 9 O'Clock | 93.0 |
| 3 O'Clock | 92.8 |
| Butt Cap | 103.8 |
Head Boom Team 2022…BOOM!
It is here, and I bet you heard another big BOOM recently!
The Head Boom Team 2022 has arrived and is ready for you to try! The Boom Team is a valuable addition to the Head lineup.
For years players have been asking for a 102 square inch racquet that has the “player” characteristics they wanted.
Player characteristics can mean different things to different players, but here is what the Head Boom Team 2022 has:
A fairly thin beam
A thin head cross-section
A modified box beam shaft cross-section
This racquet continues with Graphene and fresh Auxetic material that has been popular in the Boom Pro and Boom MP!
All specifications are in the chart below but suffice to say; this is a significant step in the right direction!
Looking at the inside of the shaft, you will notice the transitional shape from a thin box beam into a slightly thicker trapezoidal beam.
The head shape also continues with the broader upper section like the Boom Pro and Boom MP. Most “aggressive” shots are hitting the string bed in this area, so giving it more energy makes sense!
The density of the string in that area should contribute to good string life.
The first thing you notice upon pickup (first moment) is the weight distribution. While this is still a “headlight” model (see the specs below), the weight is toward the tip of the racquet.
We have had great results with the Boom Pro and Boom MP in both “retail” and full custom racquets, so, If you are considering a racquet upgrade, this one should be on your list!
| Manufacturer | Head |
|---|---|
| Racquet Model | Head Boom Team 2022 |
| Reference Tension | 55 lbs - 24.9 kg |
| String | Head Reflex MLT 17 |
| Machine Used | True Tension Professional |
| ASPS, RDC | 48.0 |
| ASPS, FlexFour | 64 |
| Racquet Flex, RDC | 61 - After stringing |
| Racquet Flex, FlexFour | 45.0 |
| Racquet - In Plane Stiffness | 389.6 lbs/Inch |
| Weight, Grams | 300 |
| Weight, Ounces | 10.58 |
| Balance, mm | 337 |
| Balance, Inch | 13.27 |
| Length, Cm | 68.6 |
| Length, Inch | 27.008 |
| Head Width | 9.97 |
| Head Length | 13.065 |
| Head Area, cm2 | 659.7 |
| Head Area, Sq. Inch | 102.3 |
| Number of Main Strings | 16 |
| Number of Cross Strings | 19 |
| Ratio Cross/Mains | .642 |
| Main String Grid | 7.80 |
| Cross String Grid | 10.80 |
| Density (% of head filled with string) | .845 |
| Average Cross String Space | .568 |
| Average Main String Space | .500 |
| Dynamic Tension, Kp, ERT | 33 |
| Dynamic Tension, Lbs/in | 184.57 |
| First Moment, Nm | .786 |
| Polar Moment | 320 |
| Torsional Stability | 15 |
| Swing Weight, Kg/cm2 | 305 |
| Swing Weight, Ounces | 10.76 |
| Swing Weight Calculated | 340.7 |
| Power, RDC | 46 |
| Control, RDC | 54 |
| Manueverability, RDC | 83 |
| Power, Calculated | 1921.4 |
| Head Points | 1.89 |
| Head Weight, % | 49.1% |
| Center of Percussion | 20.8 |
| Dwell Time, ms | 9.18 |
| Efective Stiffness - lbs | 26.9 |
| K, Lb/In | 153.85 |
| Recoil Weight | 138.76 |
| Twist Weight | 222.21 |
| End Weight | 114.3 |
| Tip Weight | 187.8 |
| 9 O'Clock | 91.5 |
| 3 O'Clock | 93.6 |
| Butt Cap | 114.8 |
Sign Up For Good Communication!
Over the past few years, telephone communication has become more frustrating due to robocalls!
I know how frustrating this can be for you because it also happens to us…so we are trying to do something about it.
We are activating a new SMS service that will allow us to communicate more quickly and efficiently. SMS is simply a text message sent to your phone instead of e-mail.
To get this to work, we need you to “opt In”! On the home page of this site are two “sigh-up” buttons, one on the right and one on the left! That is how important we believe this communication is! Two buttons!
Please join us in this new communication service to keep you informed about the “Spring Cleaning” going on now, plus other exciting things planned for the future!
We will not send you too much stuff or share your information!
Goodbye, Russell
Our Friend Russell Williams succumbed to his three (3) year battle with ALS on the 29th of March.
I include an obituary for Russell because it includes a link to support the University of Florida ALS research program.
Russell was an avid tennis player, as he was by all accounts quite good. We have forty (40) of his sixty (60) or so Babolat Pure Control racquets that he loved so much. Russell kept the racquets in top shape, so he would never consider switching!
Sophie, Russells’ daughter, is quite an accomplished tennis player and will be going to UF, where she has signed to play tennis!
Goodbye, our friend!
Barbara planted a Reed Begonia for Russell. If you are near The Leu Botanical Garden in Orlando you can find Russell’s begonia in the White Garden.
“I planted a white reed begonia in the White Garden. We will watch it grow and flower and think of all of you.”
SBS…what is it and why should we care?
We have made several posts regarding SBS, which is “String Bed Stiffness” and this is another one!
If you read this post we really need your comment(s), really!
String bed stiffness is the “feeling” when the ball hits the string on a tennis racquet. Due to the various string materials there will be “soft” and “hard” feelings. But wait, there’s more!
The string bed is made up of several strings, some longer called the Main string (M)and some shorter called the Cross string(X). Using “reference” tension each of the sets of string will be pulled at the same machine setting! It the machine is set at 50 pounds the tension head will stop pulling when it feels 50 pounds of resistance, regardless of what he tension inside the racquet head may be.
Let’s say you come into the world headquarters and we ask you what SBS you would like to have? Would you know? Probably not and not many would! We have grown up using the term “reference tension”, not SBS.
Reference tension is “number” you would ask your racquet technician to set the stringing machine tension system on. That number will probably be between 30 and 60 pounds (≈13 to 26 Kilo).
So, depending on many other variables, such as string material, string pattern, stringing machine, stringer technique, etc., you can end up with may different versions of the same “reference tension”.
A better way, and one we have been using for over thirty (30) years, is SBS but not everyone has bought into the concept, even though a qualified racquet technician will have a way to measure SBS! Maybe because it is too much trouble to figure out what your desired SBS from machine X would be from machine A! It is not!
There have been several really good SBS data collection devices but they have been difficult to use, and pricy! Not to mention gigantic!
A call to action!
So here is where you come in,
Would you purchase a SBS data collection device?
How much would you pay for such a device?
Would you prefer a mechanical device or an electronic device?
The device must be portable, that is easily carried in a racquet bag or backpack
Yes or It doesn’t matter
It must be easy to use.
If you use an SBS device would you use a racquet technician that did not know what SBS is or how to measure it?
Thank you for adding your comments to this discussion! It is important stuff!
New Head Racquet Names
There is a need for clear descriptions of tennis racquets so you, and we can make good buying decisions.
Head has applied this to the Prestige 2021 Series and it is a little confusing, maybe. So here is the information as we know it right now and according to the racquets in stock is correct:
New Head Prestige Names
You can see the entire Prestige 2021 Line-Up including additional data here
…then there was this big BOOM!
Boom Pro
The big BOOM you heard was the arrival of the new Head Boom MP and Boom Pro racquets at the World Headquarters!
Head Boom MP
This is very exciting news for those that have been waiting!
The wait is over!
For those that pre-ordered, your racquet will be prepared for you quickly. For those that have not yet tried the new Boom series…what are you waiting for?
We also offer Full Custom Boom MP and Boom Pro racquets that are built for you including longer length if desired.
Either way, we think you will be hearing more big Booms very soon!
Head Lynx Touch! Two for One?
Several weeks ago we received the first sets of Head Lynx Touch 17 gauge strings. Yesterday we received the Lynx Touch 16 gauge version and want to share the differences…numerically!
Quickly, this string is composed of two (2) separate but “combined” filaments. So, is this a monofilament or a multifilament? The numbers indicate it reacts like a monofilament as we have become familiar with it.
Head Lynx Touch
Let’s start with the 17 gauge version:
Lynx Touch 17
The area under the heavy red lines is the “stress/strain” curve and we see that this string takes 23.5mm to reach the 50-pound mark. This is just a number unless it is compared to other strings so it is neither good nor bad, right now!
You can see that the string will hold up to 149.8 pounds before it breaks. This is tensile strength and may be important when considering the amount of “notching” that can occur. The “knot” strength of this version is 132.4 pounds.
Now let’s look at the 16 gauge version:
Lynx Touch 16
The difference is subtle. The 16 gauge version is a little stiffer (expected) and a little stronger in tension (also expected). The “knot” strength of this version is 133.6 pounds.
What is interesting is the “grouping” of the stress/strain cycles on both strings. They indicate a good elasticity. The closer to the “zero” point on unloading the better!
In our opinion, both versions of the string would be considered “stiff” and suitable for the player looking for a stiff but stable string as our creep test confirmed.
If you currently use stiff strings and would like better consistency this would definitely be a candidate ./
We Believe!
In addition to our commitment to full custom racquets, we also believe in racquets that have been pushed aside by newer models just because it is the thing to do each year!
Of course, there can be material and design changes to racquets that make them desirable and that is always a good thing but maybe not every year! Our experience has been that a typical consumer will use a racquet for about three (3) years. But we also know that there are those players that want the very latest of everything!
We know the Head Speed Graphene Touch is an extraordinary tennis racquet! The shared hole string pattern was around for a short time but it is a good pattern…so we have some of those!
The Head Prestige Tour Graphene 360+ is another incredible tennis racquet that should not be overlooked even though the Auxetic Prestige series is here. The Prestige Tour features a 99 square inch head size with an 18×19 string pattern. This is a real “players” racquet, to use the common descriptive, although anyone can play with this racquet. We have these!
The Yonex V-Core without the VDM is another example of a good racquet being replaced before its time, and the same goes for the V-Core Pro 97 and 100! Some players prefer the feedback of the non-VDM racquets. We have those.
The previous version of the Wilson Ultra 100 is preferred by some due to the grip pallet configuration and construction.
So what is the point, here?
Very simply it is to let everyone know that there is life after new models by opting for an older model, and, letting those that prefer previous models know that some are available. These racquets will not be “dumped”, they are too good for that!
Of course, there are not many of the “special” racquets so use the “Easy Order” tab to let us know you are thinking about one or more!
Do You Need Something Special – Update
Happy New Year!
We have begun to receive additional full custom racquets and components so this update will let you know what is available now.
Full Custom Racquet Components
For 2022 we have added:
Head Prestige Pro (Auxetic) 98, Thin beam: 21, 20, 20mm, String Pattern: 18×20
Head Boom Pro (Auxetic) 98, Thin beam: 22mm, String Pattern: 16×19
Head Boom MP (Auxetic) 100, Thinish beam: 21, 24, 23.5mm, String Pattern: 16×19
Head Extreme Tour (big picture above) 98, Thin beam: 21, 23, 22mm, String Pattern: 16×19
Head Extreme MP (360+) 100, Thinish beam: 23, 26, 21mm, String Pattern: 16×19
Head Gravity Pro (hot lava/teal)(360+) 100, Thin beam: 20mm, String Pattern: 18×20
*Head Prestige Mid (Graphene Touch), 93, Thin beam: 20mm, String Pattern: 16×19
Head Calfskin Leather Grip
-
- Boom
These are limited in quantity and require complete customization and assembly to create a full custom racquet for you. If you are interested please let us know so we can begin the specification conversation. We have designed an “order” format however it does not allow for the conversation necessary to create your racquet, so…
Use the “Easy Order” tab to get started.
*One Remaining
Do You Need Something Special?
Full Custom Racquet Components
We have a few “full custom” racquets remaining and when these are gone there will not be any more until later in 2022!
So, if you are interested in a “special” racquet for yourself or a tennis player you like, now is the time!
We have Head Extreme Tour, Head Extreme MP, Gravity Pro, and Head Speed MP in very limited numbers. These racquets can be configured in lengths up to 27.75 inches, in any grip size from 1/4 to 5/8 ( 2 to 5), and any weight and swing weight. Either leather or synthetic grips are available.
Of course, custom stringing can be added. All orders must be received by December 13th if you need your full custom racquet for a gift.
Please use the Easy Order tab on this site if you have any questions or want to place your order. You may text us at 407.491.4755
What’s The Difference?
As tennis players, you must constantly ask “what’s the difference” when it comes to tennis racquets and string! Well, as racquet technicians we ask the same questions!
This post is intended to showcase the differences of string in testing, not playing, however, some of the data may be noticeable to the player in certain situations.
What this graph shows us, in addition to our trying to save a tree by printing on the back of previously used paper, is that each of these stings will provide almost the same performance. This is indicated by the curve and how closely related the strings are.
Tensile Strength Comparison
The differences you do see here can be attributed to the gauge, or diameter, of the string, with the largest diameter (Tour Bite) having the highest tensile strength. Down in the “hitting” displacement range (way below the 39.9mm!), there is very little difference.
The tensile strength can be a factor as the string begins to “notch” or otherwise come apart. Each of the strings in this graph is monofilament so notching would be the failure mode in a racquet.
Head Prestige Pro 2021
This years Head Prestige Pro is last years Prestige MP. This name change was made to synchronize all the 18×20 string patterns as the “Pro” model…I think!
So, what’s in a name? A thin beam, heavy (sort of), 18×20 pattern, players racquet, that’s what! The Prestige Pro also includes the new Auxetic material and construction for a refined feel.
For some reason Head Prestige racquets have been called “stiff” by some and this is certainly not the case and never has been. This racquet is not stiff! As with any racquet the string selection can have a huge effect on “stiffness” so take a look at the effective stiffness!
I believe this is going to be a “control freaks” racquet! This racquet could also be a baseliners dream come true. The weight will drive through the ball and the swing weight will allow for some last nano-second stroke adjustments.
Take at look at the data below then go to the Prestige 2021 Comparative Data post to see all the models in one place.
| Manufacturer | Head |
|---|---|
| Racquet Model | Head Prestige Pro 2021 |
| Reference Tension | 52 lbs - 23.6 kg |
| String | Head Reflex MLT 17 |
| Machine Used | True Tension Professional |
| ASPS, RDC | 53.0 |
| ASPS, FlexFour | 62.5 |
| Racquet Flex, RDC | 58 - After stringing |
| Racquet Flex, FlexFour | 36.0 |
| Racquet - In Plane Stiffness | 326.1 lbs/Inch |
| Weight, Grams | 342 |
| Weight, Ounces | 12.06 |
| Balance, mm | 318 |
| Balance, Inch | 12.52 |
| Length, Cm | 68.6 |
| Length, Inch | 27.008 |
| Head Width | 9.48 |
| Head Length | 13.06 |
| Head Area, cm2 | 627.4 |
| Head Area, Sq. Inch | 97.2 |
| Number of Main Strings | 18 |
| Number of Cross Strings | 20 |
| Ratio Cross/Mains | .653 |
| Main String Grid | 7.56 |
| Cross String Grid | 10.24 |
| Density (% of head filled with string) | .791 |
| Average Cross String Space | .513 |
| Average Main String Space | .417 |
| Dynamic Tension, Kp, ERT | 35 |
| Dynamic Tension, Lbs/in | 195.76 |
| First Moment, Nm | .832 |
| Polar Moment | 333 |
| Torsional Stability | 15 |
| Swing Weight, Kg/cm2 | 318 |
| Swing Weight, Ounces | 11.22 |
| Swing Weight Calculated | 345.8 |
| Power, RDC | 45 |
| Control, RDC | 56 |
| Manueverability, RDC | 75 |
| Power, Calculated | 1811.5 |
| Head Points | 7.87 |
| Head Weight, % | 46.4% |
| Center of Percussion | 20.7 |
| Dwell Time, ms | 8.74 |
| Efective Stiffness - lbs | 27.7 |
| K, Lb/In | 169.87 |
| Recoil Weight | 157.84 |
| Twist Weight | 230.87 |
| End Weight | 143.2 |
| Tip Weight | 198.9 |
| 9 O'Clock | 102.8 |
| 3 O'Clock | 100.3 |
| Butt Cap | 140.3 |
Head Prestige 2021 Series Comparative Data
Jumping back and forth between reviews and data is not fun nor is it efficient so we have been posting comparative data. Now all the important stuff is in one place.
All of the data is based on a “play ready” racquet. That means an overgrip and vibration damper, and unless otherwise noted…string!
As you are looking at the data try to determine which numbers mean the most to you and how you could use them. For example, the Pro has an overall weight of 342 with a swing weight 318. How does that compare to the MP?
Keep in mind that weight and swing weight can increased but not easily decreased. No, making the racquet more “head light” statically does not reduce the swing weight as recorded on testing devices that grab the racquet 10cm from the end! That is why static balance (CG) should not be used as a performance metric.
Click here to see the data!
Head Prestige Tour 2021
This racquet has the potential to be the hottest new Prestige in a long time. The “Tour” series is not new to the Prestige line but this one has some differences that are meaningful, we think!
This new Tour is a 16×19 string pattern inserted into a 95 square inch hitting area! Compare that to the previous Tour with a 18×19 string pattern in a 99 square inch head(now the new Prestige MP)…so you can see where this one is headed!
Also included in the Prestige Tour is the Auxetic material and construction that is intended to provide a better feeling impact and maybe a little more “energy”. The shaft has a slightly different geometry and is a little shorter than some other models, however, the graphics indicate the shaft is “elongated”.
The “box” beam is a relatively constant 22mm from start to finish and is beautifully done in matt black transitioning into the Prestige maroon.
| Manufacturer | Head |
|---|---|
| Racquet Model | Head Prestige Tour 2021 |
| Reference Tension | 53 lbs - 24.0 kg |
| String | Victrex 7718 (PEEK) |
| Machine Used | True Tension Professional |
| ASPS, RDC | 50.0 |
| ASPS, FlexFour | 63.5 |
| Racquet Flex, RDC | 63 - After stringing |
| Racquet Flex, FlexFour | 42.5 |
| Racquet - In Plane Stiffness | 384.6 lbs/Inch |
| Weight, Grams | 336 |
| Weight, Ounces | 11.85 |
| Balance, mm | 326 |
| Balance, Inch | 12.83 |
| Length, Cm | 68.5 |
| Length, Inch | 26.968 |
| Head Width | 9.406 |
| Head Length | 12.78 |
| Head Area, cm2 | 608.9 |
| Head Area, Sq. Inch | 94.4 |
| Number of Main Strings | 16 |
| Number of Cross Strings | 19 |
| Ratio Cross/Mains | .620 |
| Main String Grid | 7.20 |
| Cross String Grid | 9.125 |
| Density (% of head filled with string) | .695 |
| Average Cross String Space | .464 |
| Average Main String Space | .445 |
| Dynamic Tension, Kp, ERT | 34 |
| Dynamic Tension, Lbs/in | 190.16 |
| First Moment, Nm | .844 |
| Polar Moment | 347 |
| Torsional Stability | 16 |
| Swing Weight, Kg/cm2 | 331 |
| Swing Weight, Ounces | 11.68 |
| Swing Weight Calculated | 357.1 |
| Power, RDC | 53 |
| Control, RDC | 47 |
| Manueverability, RDC | 66 |
| Power, Calculated | 1968.0 |
| Head Points | 5.20 |
| Head Weight, % | 47.6% |
| Center of Percussion | 21.1 |
| Dwell Time, ms | 9.00 |
| Efective Stiffness - lbs | 27.9 |
| K, Lb/In | 160.26 |
| Recoil Weight | 161.61 |
| Twist Weight | 223.59 |
| End Weight | 136.8 |
| Tip Weight | 200.6 |
| 9 O'Clock | 99.5 |
| 3 O'Clock | 101.4 |
| Butt Cap | 134.9 |
Head Boom MP 2022
Head has introduced a brand new racquet! So, you say, what’s new about that they do it every year! Yes, but this is a different racquet!
This is the Boom!
In all the years we have been dealing with Head it has become clear that they are not averse to making new things…instead of drastically changing old things.
The Boom is available in a Pro version and a MP version, with the Pro version being a little heavier.
So the Boom, which will be available in January of 2022, (pre order now!) is a new racquet and it is not shy about it!
The head shape is a little different, the shaft is a little different, and the Auxetic material and construction is a little different and all these “littles” add up to a totally different hitting experience!
The shaft transitions from a common box to a trapezoid as it junctions with the yoke (which is the Auxetic area, don’t forget)
The 24mm beam (actually 22, 24.4, 23.3) is a solid choice for advancing players offering just the right amount of stiffness for a little extra “punch”.
We believe the recoil weight could be higher and that is easily accomplished when wanted.
| Manufacturer | Head |
|---|---|
| Racquet Model | Head Boom MP 2022 |
| Reference Tension | 55 lbs - 24.9 kg |
| String | Tecnifibre BiPhase 124 |
| Machine Used | True Tension Professional |
| ASPS, RDC | 55.0 |
| ASPS, FlexFour | 64.0 |
| Racquet Flex, RDC | 62 - After stringing |
| Racquet Flex, FlexFour | 42.0 |
| Racquet - In Plane Stiffness | 344.8 lbs/Inch |
| Weight, Grams | 320 |
| Weight, Ounces | 11.29 |
| Balance, mm | 327 |
| Balance, Inch | 12.87 |
| Length, Cm | 68.6 |
| Length, Inch | 27.008 |
| Head Width | 9.83 |
| Head Length | 12.84 |
| Head Area, cm2 | 639.4 |
| Head Area, Sq. Inch | 99.1 |
| Number of Main Strings | 16 |
| Number of Cross Strings | 19 |
| Ratio Cross/Mains | .645 |
| Main String Grid | 7.61 |
| Cross String Grid | 10.68 |
| Density (% of head filled with string) | .774 |
| Average Cross String Space | .475 |
| Average Main String Space | .562 |
| Dynamic Tension, Kp, ERT | 35 |
| Dynamic Tension, Lbs/in | 195.7 |
| First Moment, Nm | .807 |
| Polar Moment | 325 |
| Torsional Stability | 13 |
| Swing Weight, Kg/cm2 | 312 |
| Swing Weight, Ounces | 11.01 |
| Swing Weight Calculated | 342.2 |
| Power, RDC | 45 |
| Control, RDC | 56 |
| Manueverability, RDC | 79 |
| Power, Calculated | 1936.2 |
| Head Points | 5.04 |
| Head Weight, % | 47.7% |
| Center of Percussion | 20.80 |
| Dwell Time, ms | 8.58 |
| Efective Stiffness - lbs | 29.1 |
| K, Lb/In | 176.26 |
| Recoil Weight | 149.42 |
| Twist Weight | 231.14 |
| End Weight | 127.9 |
| Tip Weight | 191.8 |
| 9 O'Clock | 96.5 |
| 3 O'Clock | 96.1 |
| Butt Cap | 126.8 |
Head Prestige MP 2021 Series
OK, here comes another racquet review!
You know our reviews are “numbers” based, not hitter based because we just like numbers! Hitters are Important but to get the most meaningful data from a racquet requires numbers. These numbers can then be applied to the feedback of the hitter.
The new Head Prestige MP 2021 is a 99 square inch head with the 18×19 string pattern so common in player style racquets. This combination may “scare off” some users but that would be a mistake in our opinion.
As you would expect this racquet is a thin box beam box design which creates an in plane stiffness of 384.6 pounds, which can be used to create a very friendly string bed stiffness. Take a look at the “effective stiffness” and you will see what we mean!
In addition to the nice in plane stiffness this racquet uses Head’s new Auxetic construction in the throat which is designed for comfort and control from each hit by allowing the throat to “expand 
and contract” a little.
The bright red color of last years Prestige series has been replaced with a “matt” graphite transitioning into the classic Prestige maroon aroun
d the head of the racquet making this a classic in its own right!
| Manufacturer | Head |
|---|---|
| Racquet Model | Head Prestige MP 2021 |
| Reference Tension | 55 lbs - 24.9 kg |
| String | Victrex 7718 (PEEK) |
| Machine Used | True Tension Professional |
| ASPS, RDC | 54 |
| ASPS, FlexFour | 66.0 |
| Racquet Flex, RDC | 63 - After stringing |
| Racquet Flex, FlexFour | 41.0 |
| Racquet - In Plane Stiffness | 384.6 lbs/Inch |
| Weight, Grams | 332 |
| Weight, Ounces | 11.71 |
| Balance, mm | 327 |
| Balance, Inch | 12.87 |
| Length, Cm | 68.6 |
| Length, Inch | 27.008 |
| Head Width | 9.551 |
| Head Length | 13.13 |
| Head Area, cm2 | 635.4 |
| Head Area, Sq. Inch | 98.5 |
| Number of Main Strings | 18 |
| Number of Cross Strings | 19 |
| Ratio Cross/Mains | .689 |
| Main String Grid | 8.00 |
| Cross String Grid | 10.10 |
| Density (% of head filled with string) | .727 |
| Average Cross String Space | .529 |
| Average Main String Space | .396 |
| Dynamic Tension, Kp, ERT | 35 |
| Dynamic Tension, Lbs/in | 195.7 |
| First Moment, Nm | .837 |
| Polar Moment | 343 |
| Torsional Stability | 17 |
| Swing Weight, Kg/cm2 | 326 |
| Swing Weight, Ounces | 11.50 |
| Swing Weight Calculated | 355.0 |
| Power, RDC | 49 |
| Control, RDC | 52 |
| Manueverability, RDC | 69 |
| Power, Calculated | 2042.9 |
| Head Points | 5.04 |
| Head Weight, % | 47.7% |
| Center of Percussion | 21.016 |
| Dwell Time, ms | 8.66 |
| Efective Stiffness - lbs | 29.1 |
| K, Lb/In | 173.08 |
| Recoil Weight | 157.3 |
| Twist Weight | 227.24 |
| End Weight | 133.1 |
| Tip Weight | 200.8 |
| 9 O'Clock | 101.3 |
| 3 O'Clock | 98.9 |
| Butt Cap | 131.3 |
What Can Pictures Tell Us About String?
It is said that “a picture is worth a thousand words,” which may be true as long as the picture tells a story.
This story is about natural gut string, and the pictures will show what we can achieve, informationally, with our testing equipment. The two (2) strings are Babolat VS Touch 17 and Luxilon Natural Gut 125.
Our Questron software scales the images to suit the data so the graphs will not be the same size.
Babolat VS Touch 17
Our testing loads the string from 0 pounds force to 50 pounds and back to zero then up to 50 pounds three (3) times. This is the “stress/strain” curve. Fifty (50) pounds is arbitrary and because we are using the same methodology for all string materials it is a good number. The closer these lines are together the better.
The farther it takes to reach 50 pounds the “higher elongation” the string is. In this case it is about 44mm.
The important property of this string is the linearity! That is the “straightness” of the line from beginning to end. This indicates predictability, stability, and consistency.
This picture tells us the tensile strength and the knot strength. In this case the knot strength is 52.3 pounds and takes a stretch to very close to 60mm before failure.
Luxilon Natural Gut 125
What is, probably, the first thing you notice about this “picture”? Could it be the squiggly lines? What could be causing this?
We believe it is the “break-in period” players associate with Luxilon gut! We have heard it from the players but have not been able to “see” it! It could be the bonding agents realigning as the load is applied.
You will notice a couple of things: the similarity of the “stress/strain” curve and the displacement to “knot strength” of the two strings. This string will feel a little less “soft” than the Babolat VS Touch 17. The linearity is quite good up to failure.
So, based on these pictures, could you make a recommendation? If so, let us hear them!
And The Winner Is…
The winner is Tecnifibre MultiFeel 17!
This string, MultiFeel, is a very “soft” polyurethane bonded construction that offers playability and a good value!
Tecnifibre MultiFeel !7 Gauge
This graph shows the high elongation and nice elasticity of this string. The fairly linear slope up to failure would indicate some consistency of shot all the way up to breakage!
The knot strength is pretty good for a thin multifilament and we can say from experience that the know is going to be fine when property “tightened” and large enough to not slip bak into the grommet barrel.
If you are considering a multifilament this would be a good one to try!
Celebrity Visitors!
The World Headquarters of Racquet Quest, LLC was happy to welcome Randy St. Pierre and Henry Hamels for a visit!
Randy is a member of the Dunlop Stringing Team and is from the UK and Henry is the principal of String MD in Florida! Randy has been stringing racquets for quite a while and is always a source of good information…and he bought lunch!
Randy & Henry
Randy lives in a beautiful part of England so we are all invited to his house when the weather is better…is that right Randy?
Randy remembers stringing for a young player named Emma at a tournament in Nottingham when young Emma was in the 300’s world wide! Look at her now! Was it Randy or something else? I wonder!
Anyway it was great fun having these guys here and they are welcome anytime as are all of you reading this!
And the winner is…Head FXP 17
Head FXP is a string that seems to be largely overlooked and I am surprised after seeing the results of the installation and testing!
| String Name | Category | Gauge | Ultimate Tensile Strength/Lbs | Knot Strength/Lbs | Country of Origin |
|---|---|---|---|---|---|
| Head FXP | Multifilament - Nylon | 17 | 165.9 | 93.4 | Japan |
Both the tensile strength and knot strength are exceptional and the graph shows that this string is very “elastic” which is a good thing for tennis racquet string but sometimes just not considered.
Head FXP 17
The area under the solid red lines is considered a stress-strain curve and indicates the “elasticity” of string by how close the lines fit from 0 to 50 three (3) times. A perfectly elastic material would be one line even though it went through three (3) cycles. What you see here is quite good and one of the reasons it is the winner!
And the winner is…overview
Racquet Quest is going to add a “winner” of the week to our website as a way to develop a fun way to look at string!
Each week we will select a string that has exhibited outstanding properties from one of five (5) major categories:
-
- Synthetic Gut
- Mulit-filamanet
Nylon
PEEK - Natural gut
- PEEK Monofilament
- Polyester Monofilament
The winning string must have been installed in the most recent week either in a client or demo racquet.
We will include as much information as possible including graphs and the country of origin.
We will try to post “And the Winner is…” on Friday so take look!
Our Favorite String
A frequently asked question by our clients at the World Headquarters of Racquet Quest, LLC is “what is your favorite string?”
I am going to tell you what it is, and tell you why it is, and why, I believe, it should be your favorite string as well!
VS Team v VS Team
It should come as no surprise that natural gut is our favorite string! Well, of course, you say! It is probably everyones favorite but it is way too expensive for most recreational players! You are correct that natural gut is everyones “favorite” string, however, you may not be correct about it being too “expensive” for recreational players!
What follows is predicated on the belief that “performance” is the primary factor in selecting a string.
On the positive side:
- Natural gut plays better longer than any other material.
- Natural gut is more stable than most string materials.
- Natural gut is more forgiving (comfort) than most other materials.
- Natural gut is more eco-friendly than other materials.
- Natural gut is a good hybrid component.
On the not so positive side:
- Natural gut is expensive @ $70.00 to $75.00 (installed).
- Natural gut is more expensive than other materials.
- Making natural gut string is very labor intensive.
- Making high quality natural gut is limited to a “few” major manufacturers.
- Natural gut can be affected by moisture.
And, how do you quantify “plays better”, anyway? Some players are fine with string that has long since offered any performance! Some strings have a “play”life of a couple of hours! So, the player must decide on what is important.
But, if you ask us, natural gut is our favorite string!
String Evaluation Program
Racquet Quest, LLC has for years been doing the extensive evaluation of racquets and string for the benefit of our client’s customization requirements.
Now we are making this evaluation “program” available to anyone that wants to dig deeper into the workings of the string in the racquet!
This is serious stuff and requires significant resources but it is worth it!
Please contact us of you would like to take advantage of our evaluation program!
Prince Vortex 300
The new Prince Vortex design is a new offering of an older string pattern with 14 main strings and 21 cross strings in a variable taper beam…whew! You can see by the throat design that the main strings are longer that a conventional throat design. The longer the main strings the more energy they can return…sort of, and in some cases!
Vortex 300
The beam starts at the grip with a strong 25mm then tapers into a 23mm at the throat and then back to 25mm at the tip. Do not let the beam dimensions fool you! The RDC flex of 59 after stringing is quite acceptable for most every player style.
We have been taking coefficient of friction (COF) data for years but have not included it this review format, until now. The 14×21 string pattern is unique enough that it is worth including. You will see the numbers on the review specs so we won’t go into them now, however the numbers are interesting.
The 14 main strings contribute to a very “open” area right about where most extreme “spin” shots are hit according to our data of string failure positions.
The frame geometry is sort of “Aero” like. The shaft is trapezoidal that transitions into a “reverse” trapezoid around the head. It makes the racquet look stiffer than it is!
Take a look at the specs then pick up a demo to see what the numbers mean to you!
| Manufacturer | Prince |
|---|---|
| Racquet Model | Prince Vortex 300 |
| Reference Tension | 56 lbs - 25.4kg |
| String | Victrex 7718 |
| Machine Used | True Tension Professional |
| ASPS, RDC | 45 |
| ASPS, FlexFour | 58.5 |
| Racquet Flex, RDC | 59 - After stringing |
| Racquet Flex, FlexFour | 40.0 |
| Racquet - In Plane Stiffness | 526.3 lbs/Inch |
| Weight, Grams | 322 |
| Weight, Ounces | 11.36 |
| Balance, mm | 320 |
| Balance, Inch | 12.60 |
| Length, Cm | 68.6 |
| Length, Inch | 27.008 |
| Head Width | 9.94 |
| Head Length | 12.94 |
| Head Area, cm2 | 652 |
| Head Area, Sq. Inch | 101.1 |
| Number of Main Strings | 14 |
| Number of Cross Strings | 21 |
| Ratio Cross/Mains | .512 |
| Main String Grid | 7.30 |
| Cross String Grid | 9.50 |
| Density (% of head filled with string) | .686 |
| Average Cross String Space | .452 |
| Average Main String Space | .521 |
| Dynamic Tension, Kp, ERT | 32 |
| Dynamic Tension, Lbs/in | 176.98 |
| First Moment, Nm | .790 |
| Polar Moment | 336 |
| Torsional Stability | 17 |
| Swing Weight, Kg/cm2 | 319 |
| Swing Weight, Ounces | 11.25 |
| Swing Weight Calculated | 329.7 |
| Power, RDC | 47 |
| Control, RDC | 52 |
| Manueverability, RDC | 74 |
| Power, Calculated | 1921.1 |
| Head Points | 7.24 |
| Head Weight, % | 46.6 |
| Center of Percussion | 21.7 |
| Dwell Time, ms | 9.48 |
| Efective Stiffness - lbs | 30.2 |
| K, Lb/In | 144.23 |
| Recoil Weight | 165.41 |
| Twist Weight | 237.56 |
| End Weight | 134.5 |
| Tip Weight | 189.0 |
| 9 O'Clock | 96.2 |
| 3 O'Clock | 96.1 |
| Butt Cap | 131.4 |
| Coefficient of Friction: M | .400 |
| Coefficient of Friction: X | .262 |
Prince RipStick 300
I am not saying the is not a serious tennis racquet but the first descriptor that come to mind is “fun”! And who does not want to have a little fun while playing tennis, huh?
RipStick 300
This is one of the remaining racquets with the “O” Port technology which is very large string openings instead of small grommet holes. The design allows for much more string movement and the 16×18 string bed helps! The “O” Ports create an effective head size of 105 in a racquet that measures 100 square inches.
But, just look at those colors! I think they are awesome!
This is a constant taper beam starting at 22.5mm going up to 27mm so if you are “thin beam” person you may hesitate to hit with this racquet, but we think you may be missing out!
If you just look at the racquet you may think it to be quite stiff. That is not the case! With an RDC stiffness of 62 after stringing we arrive at an effective stiffness of 30.2 with this string setup. Not bad!
Take a look at the specs then come get the demo and see what all these numbers mean to you!
| Manufacturer | Prince |
|---|---|
| Racquet Model | Prince RipStick 300 |
| Reference Tension | 60 lbs - 27.2kg |
| String | Prince Premier 16 |
| Machine Used | True Tension Professional |
| ASPS, RDC | 59 |
| ASPS, FlexFour | 64.5 |
| Racquet Flex, RDC | 62 - After stringing |
| Racquet Flex, FlexFour | 46.6 |
| Racquet - In Plane Stiffness | 504.2 lbs/Inch |
| Weight, Grams | 328 |
| Weight, Ounces | 11.57 |
| Balance, mm | 323 |
| Balance, Inch | 12.72 |
| Length, Cm | 68.6 |
| Length, Inch | 27.008 |
| Head Width | 10.00 |
| Head Length | 12.87 |
| Head Area, cm2 | 645 |
| Head Area, Sq. Inch | 100.1 |
| Number of Main Strings | 16 |
| Number of Cross Strings | 18 |
| Ratio Cross/Mains | .694 |
| Main String Grid | 7.56 |
| Cross String Grid | 9.12 |
| Density (% of head filled with string) | .679 |
| Average Cross String Space | .531 |
| Average Main String Space | .469 |
| Dynamic Tension, Kp, ERT | 36 |
| Dynamic Tension, Lbs/in | 201.35 |
| First Moment, Nm | .814 |
| Polar Moment | 337 |
| Torsional Stability | 17 |
| Swing Weight, Kg/cm2 | 320 |
| Swing Weight, Ounces | 11.29 |
| Swing Weight Calculated | 342.2 |
| Power, RDC | 43 |
| Control, RDC | 58 |
| Manueverability, RDC | 73 |
| Power, Calculated | 2095.5 |
| Head Points | 6.14 |
| Head Weight, % | 47.2 |
| Center of Percussion | 21.2 |
| Dwell Time, ms | 8.28 |
| Efective Stiffness - lbs | 30.2 |
| K, Lb/In | 189.10 |
| Recoil Weight | 159.2 |
| Twist Weight | 256.05 |
| End Weight | 134.9 |
| Tip Weight | 194.5 |
| 9 O'Clock | 100.8 |
| 3 O'Clock | 97.3 |
| Butt Cap | 130.2 |
New KT Tape Products!
KT Tape is probably the most recognized gear any athlete can wear! You see it on many world-class athletes typically placed where they may be experiencing discomfort or want to reduce the possibility of such!
Racquet Quest has added three (3) new KT Tape products we believe are essential to better performance.
The new Wave:
- Clinically proven and FDA cleared device for relief of chronic musculoskeletal pain
- 250 hours of battery life for consecutive or intermittent use
- Sensation-free electromagnetic pulses that are safe and effective
- Flexible loop is easy to place
- Water resistant, safe to wear during regular physical activity and during sweating
The new Chafe Safe:
- Protects friction-prone areas from blisters & hot spots for up to 24 hours
- Sweat & water resistant
- Mess-free, non-sticky, & smooth application
- No clogging of pores
The new Anti Blister tape:
- Designed to help prevent athlete blister, chafing, and hot spot formation*
- Ultra-durable, flexible, and breathable synthetic fabric
- Easily conforms to skin and extremely thin to minimize friction
- Precut 3.5” strips for convenient use in most common treatment areas
- KT Tape is proud to provide the KT PERFORMANCE + and KT RECOVERY + product lines, supporting athletes of all levels and helping them to perform at their best. Train longer, finish stronger
These important products contribute to Racquet Quest’s commitment to keeping our clients playing comfortably forever!
If you are new to KT Tape just click here and you will go to the very comprehensive “how to” page!
World Headquarters Update
The World Headquarters of Racquet Quest is very happy to present the latest addition to our headquarters!
My daughter and her family that live in Columbus presented me with the iconic Columbus, Indiana “C” bike rack recently! This bike rack is something I have wanted for a while!
In case you don’t know, Columbus, Indiana is well known for the many architectural buildings and pieces by many very famous people!
World Headquarters
The bike was donated by Davids Cycle World and painted by me! A very close inspection of the paint job should be avoided!
Anyway, we are very happy to have this addition to the World Headquarters!
Thank you!
And now for something completely different!
It is not often we get to do something completely different but this is that time!
Everyone loves to see what the very latest racquets are going to look like and how they will play but what about taking a look back, not forward!
This racquet review is going way back! I am not sure when this racquet was made but suffice it to say it was a while ago. I will guess that it is over sixty (60) years old.
Well, OK! What is it?
It is a Wright & Ditson Olympic!
Wright & Ditson Olympic
This is a beautiful 68 square inch wooden racquet. The wooden grip pallet is wrapped with a very wide piece of perforated leather, not the slender leather used today.
The racquet has no butt cap. Or didn’t have a butt cap but now it does.
Pay particular attention to the weight of this racquet, and the stiffness!
Many of the current racquets will be in the 315-gram range with an RDC flex of 55+.
When we received it the condition was not great but it was straight and worth renovating. We all know how beautiful some wooden racquets can be so let’s get to the specifications.
| Manufacturer | Wright & Ditson |
|---|---|
| Racquet Model | Wright & Ditson Olympic |
| Reference Tension | 45lbs/20.4kg |
| String | Head Synthethic 17 |
| Machine Used | True Tension Professional |
| ASPS, RDC | 36 |
| ASPS, FlexFour | 50 |
| Racquet Flex, RDC | 12 - After stringing |
| Racquet Flex, FlexFour | 27.0 |
| Racquet - In Plane Stiffness | 500.0 lbs/Inch |
| Weight, Grams | 401.0 |
| Weight, Ounces | 14.14 |
| Balance, mm | 307 |
| Balance, Inch | 12.09 |
| Length, Cm | 68.6 |
| Length, Inch | 27.008 |
| Head Width | 8.13 |
| Head Length | 10.8 |
| Head Area, cm2 | 444.6 |
| Head Area, Sq. Inch | 68.9 |
| Number of Main Strings | 18 |
| Number of Cross Strings | 20 |
| Ratio Cross/Mains | .677 |
| Main String Grid | 7.00 |
| Cross String Grid | 8.30 |
| Density (% of head filled with string) | .843 |
| Average Cross String Space | .415 |
| Average Main String Space | .389 |
| Dynamic Tension, Kp, ERT | 30 |
| Dynamic Tension, Lbs/in | 167.8 |
| First Moment, Nm | .932 |
| Polar Moment | 368 |
| Torsional Stability | 9 |
| Swing Weight, Kg/cm2 | 359 |
| Swing Weight, Ounces | 12.66 |
| Swing Weight Calculated | 377.9 |
| Power, RDC | 0 |
| Control, RDC | 100 |
| Manueverability, RDC | 47 |
| Power, Calculated | 296.9 |
| Head Points | 11.02 |
| Head Weight, % | 44.9% |
| Center of Percussion | 21.0 |
| Dwell Time, ms | 10.6 |
| Efective Stiffness - lbs | 9.0 |
| K, Lb/In | 115.4 |
| Recoil Weight | 189.8 |
| Twist Weight | 203.8 |
| End Weight | 174.9 |
| Tip Weight | 225.0 |
| 9 O'Clock | 115.9 |
| 3 O'Clock | 115.0 |
| Butt Cap | 168.9 |
In a string does color matter?
Of course color matters! Brands have made history on color! Prince Green, Head Orange, Babolat Blue, for racquets but what about string?
Sure, again! Luxilon Silver, Babolat Black, Solinco Green, Victrex Putty…what? Which of these monofilament strings do not have any color pigment?
If you guessed the Victrex you would be correct. But why not? The natural color of the polymer is probably the very strongest a string can be, however, without color they would not be at all interesting or recognizable! The natural Victrex color is typically what we use when evaluating the string because it is visually different.
Victrex does make strings with black-pigment, but this post is about the difference pigmentation can make in a string. In a previous post some years go we determined that color had very little affect on string properties and this evaluation shows pretty much the same result in a different format.
You can see by this graph there is very little difference between the two Volkl V-Star strings. In fact it would be safe to say the strings are identical.
Head Speed Pro Black
As you probably know by now Novak Djokovic plays with a version of the Head Speed but in black, not black and white! So it was only a matter of time until the all-black Speed Pro became available.
Until now we only had the black and white Speed Pro demo but now we have the black one!
This review will include the white and black version of the Speed and we will include a comparison to the Wilson Blade Pro!
| Manufacturer | Head |
|---|---|
| Racquet Model | Head Graphene 360 + Speed Pro Black |
| Reference Tension | 54 lbs - 24.5 kg |
| String | Head Reflex MLT |
| Machine Used | True Tension Professional |
| ASPS, RDC | 56 |
| ASPS, FlexFour | 66.5 |
| Racquet Flex, RDC | 57 - After stringing |
| Racquet Flex, FlexFour | 50.5 |
| Racquet - In Plane Stiffness | 325.2 lbs/Inch |
| Weight, Grams | 334 |
| Weight, Ounces | 11.78 |
| Balance, mm | 325 |
| Balance, Inch | 12.80 |
| Length, Cm | 68.6 |
| Length, Inch | 27.008 |
| Head Width | 9.618 |
| Head Length | 13.10 |
| Head Area, cm2 | 636.1 |
| Head Area, Sq. Inch | 98.6 |
| Number of Main Strings | 18 |
| Number of Cross Strings | 20 |
| Ratio Cross/Mains | .662 |
| Main String Grid | 7.565 |
| Cross String Grid | 10.30 |
| Density (% of head filled with string) | .7735 |
| Average Cross String Space | .513 |
| Average Main String Space | .413 |
| Dynamic Tension, Kp, ERT | 35 |
| Dynamic Tension, Lbs/in | 195.7 |
| First Moment, Nm | .836 |
| Polar Moment | 341 |
| Torsional Stability | 15 |
| Swing Weight, Kg/cm2 | 326 |
| Swing Weight, Ounces | 11.50 |
| Swing Weight Calculated | 352.8 |
| Power, RDC | 42 |
| Control, RDC | 59 |
| Manueverability, RDC | 69 |
| Power, Calculated | 1832.1 |
| Head Points | 5.51 |
| Head Weight, % | 47.0% |
| Center of Percussion | 21.016 |
| Dwell Time, ms | 8.502 |
| Efective Stiffness - lbs | 28.25 |
| K, Lb/In | 179.49 |
| Recoil Weight | 159.3 |
| Twist Weight | 231.4 |
| End Weight | 134.5 |
| Tip Weight | 198.0 |
| 9 O'Clock | 99.0 |
| 3 O'Clock | 99.6 |
| Butt Cap | 134.0 |
And now for the white and black version:
| Manufacturer | Head |
|---|---|
| Racquet Model | Head Graphene 360+ Speed Pro |
| Reference Tension | 56 lbs - 25.4 kg |
| String | Victrex PEEK fiber Experimental 7718 |
| Machine Used | True Tension Professional |
| ASPS, RDC | 55 |
| ASPS, FlexFour | 66.5 |
| Racquet Flex, RDC | 60 - After stringing |
| Racquet Flex, FlexFour | 43 |
| Weight, Grams | 327 |
| Weight, Ounces | 11.53 |
| Balance, mm | 323 |
| Balance, Inch | 12.72 |
| Length, Cm | 68.5 |
| Length, Inch | 26.97 |
| Head Width | 9.69 |
| Head Length | 13.06 |
| Head Area, cm2 | 641.2 |
| Head Area, Sq. Inch | 99.4 |
| Beam Width, mm, Shaft, Center, Tip | 23, 23, 23 |
| In Plane Stiffness, Pounds/In | 335.2 Lbs/In. |
| In Plane Stiffness, Kg/cm | 152.0 Kg/cm |
| Number of Main Strings | 18 |
| Number of Cross Strings | 20 |
| Ratio Cross/Mains | .668 |
| Main String Grid | 7.62 |
| Cross String Grid | 10.37 |
| Density (% of head filled with string) | .768 |
| Average Cross String Space | .513 |
| Average Main String Space | .414 |
| Dynamic Tension, Kp, ERT | 37 |
| Dynamic Tension, Lbs/in | 206.94 |
| First Moment, Nm | .812 |
| Polar Moment | 336 |
| Torsional Stability | 16 |
| Swing Weight, Kg/cm2 | 320 |
| Swing Weight, Ounces | 11.29 |
| Swing Weight Calculated | 341.2 |
| Power, RDC | 45 |
| Control, RDC | 57 |
| Manueverability, RDC | 73 |
| Power, Calculated | 1908.2 |
| Head Points | 6.14 (negative = head heavy |
| Head Weight, % | 47.2% |
| Center of Percussion | 21.2 |
| Dwell Time, ms, No Swing | 8.58 |
| Efective Stiffness - lbs | 28.7 |
| K, Lb/In (SBS) RDC | 176.28 |
| Recoil Weight | 159.71 |
| Twist Weight | 229.85 |
| End Weight | 133.4 |
| Tip Weight | 192.8 |
| 9 O'Clock | 97.1 |
| 3 O'Clock | 97.5 |
| Butt Cap | 131.0 |
And now for the Wilson Blade Pro:
| Manufacturer | Wilson |
|---|---|
| Racquet Model | Wilson Blade Pro |
| Reference Tension | 54 lbs - 23.6 k2 |
| String | ALU Power Rough |
| Machine Used | Unknown |
| ASPS, RDC | 35 |
| ASPS, FlexFour | 53 |
| Racquet Flex, RDC | 62 - After stringing |
| Racquet Flex, FlexFour | 48 |
| Racquet - In Plane Stiffness | 387.1 lbs/Inch |
| Weight, Grams | 337 |
| Weight, Ounces | 11.89 |
| Balance, mm | 327 |
| Balance, Inch | 12.87 |
| Length, Cm | 68.6 |
| Length, Inch | 27.008 |
| Head Width | 9.6 |
| Head Length | 12.80 |
| Head Area, cm2 | 623.3 |
| Head Area, Sq. Inch | 96.6 |
| Number of Main Strings | 16 |
| Number of Cross Strings | 19 |
| Ratio Cross/Mains | .634 |
| Main String Grid | 7.37 |
| Cross String Grid | 10.40 |
| Density (% of head filled with string) | .7934 |
| Average Cross String Space | .547 |
| Average Main String Space | .461 |
| Dynamic Tension, Kp, ERT | 27 |
| Dynamic Tension, Lbs/in | 151.0 |
| First Moment, Nm | .850 |
| Polar Moment | 358 |
| Torsional Stability | 16 |
| Swing Weight, Kg/cm2 | 342 |
| Swing Weight, Ounces | 12.06 |
| Swing Weight Calculated | 360.35 |
| Power, RDC | 55 |
| Control, RDC | 42 |
| Manueverability, RDC | 59 |
| Power, Calculated | 2069.0 |
| Head Points | 5.04 |
| Head Weight, % | 47.07 |
| Center of Percussion | 21.535 |
| Dwell Time, ms | 10.755 |
| Efective Stiffness - lbs | 22.37 |
| K, Lb/In | 112.18 |
| Recoil Weight | 170.8 |
| Twist Weight | 234.0 |
| End Weight | 135.0 |
| Tip Weight | 202.9 |
| 9 O'Clock | 100.8 |
| 3 O'Clock | 103.7 |
| Butt Cap | 132.2 |
Pick Your Prestige!
Racquet Quest specializes in high performance tennis racquets and they don’t get more high performance than the Head Prestige models!
We recognize the attachment players have to racquets so we keep a good supply of Head Prestige racquets of all models and even a year or two of prior models.
Here is what is currently available:
| Name | Material | Model | Head Size | Grip Size | String Pattern | Quantity |
|---|---|---|---|---|---|---|
| Prestige | Graphene XT | Rev Pro | 93 | 4 | 16x19 | 1 |
| Prestige | Graphene XT | Rev Pro | 93 | 3 | 16x19 | 2 |
| Prestige | Graphene XT | MP | 98 | 4 | 18x20 | 1 |
| Prestige | Graphene XT | MP | 98 | 3 | 18x20 | 1 |
| Prestige | Graphene XT | Pro | 98 | 4 | 16x19 | 1 |
| Prestige | Graphene XT | Pro | 98 | 3 | 16x19 | 2 |
| Prestige | Graphene Touch | Pro | 95 | 2 | 16x19 | 1 |
| Prestige | Graphene Touch | Tour | 99 | 3 | 18x19 | 2 |
| Prestige | Graphene Touch | Tour | 99 | 2 | 18x19 | 1 |
| Prestige | Graphene Touch | MP | 95 | 3 | 18x20 | 1 |
Still Committed to Your Racquet!
For the past few years and certainly the past year Racquet Quest has been committed to tennis racquets and yours is included!
Hopefully the days of the “mask”are over and we can resume actually talking to each other and be understood! Of course if you prefer to wear a mask that is OK, too!
Here is what is not OK!
Not caring about your tennis racquet is not OK, and by that I mean keeping it in the best possible condition. That includes string, grip, grommet sets, overgrips and general reactions of beating it against the ground or net!
We have seen five year old racquets that look brand new and five day old racquets that are in really poor shape! One of the most damaging “strokes” in tennis is the ball pickup stroke! This is not a stroke at all but a way to keep from bending over to pick up balls!
Using the racquet head to scoop up the balls is easy and cool! It is also the quick way to ruin the bumper guard which is there to protect the Racquet from normal stroke, not pick-ups!
So, what do you do about it? The next time you consider scooping up balls with the racquet consider tapping the ball to start it bouncing or simplpy use the fingers on your hand to pick up the ball…that would be good!
Looking at the Numbers and What They Mean
The following table will shed some light on the numbers we use and hopefully shed some light on what they can mean in terms of your racquet.
| Manufacturer | Yonex | What it Means |
|---|---|---|
| Racquet Model | Yonex VCore Pro 97 HD | Racquet being reviewed. |
| Reference Tension | 55 lbs - 24.9 kg | Stringing machine tension setting. Not, necessarily, the string bed stiffness. |
| String | Ashaway MonoGut ZX Pro | String brand name and gauge (Pro being 17Gauge) |
| Machine Used | True Tension Professional | Stringing machine used. |
| ASPS, RDC | 56 | The stiffness of all the strings as a unit. Normally between 30 and 65. |
| ASPS, FlexFour | 64.5 | The stiffness of the string bed as tested on this device. |
| Racquet Flex, RDC | 57 - After stringing | 50 is low (flexible) and 70 is high (very stiff). Clash 100 is 52 on this device. As is a Head Speed model. |
| Racquet Flex, FlexFour | 50 | 35 is low (flexible) 70 is high (very stiff). Clash 100 is 26 on this device. |
| Racquet - In Plane Stiffness | 353.8 lbs/Inch | This is how stiff the racquet head is across the middle. 300 is soft and 500 is very stiff. This affects the string bed stiffness. |
| Weight, Grams | 336 | 285 is light and 360 is heavy. 315 is minimum target weight for performance. |
| Weight, Ounces | 11.85 | The racquet weight in ounces, typically used in US. |
| Balance, mm | 322 | This is the center of gravity from the butt cap. If you put the racquet on a round rod this would be how much is hanging toward the butt cap. |
| Balance, Inch | 12.68 | This is the CG in ounces for US. Points head heavy or head light is part of this. |
| Length, Cm | 68.5 | This is the total length of the racquet and is the typical standard adult length. |
| Length, Inch | 26.968 | This is length in inches for the US. |
| Head Width, Inches | 9.57 | The inside width of the hitting area. |
| Head Length, Inches | 12.54 | The inside length of the hitting area. |
| Head Area, cm2 | 625.8 | The advertised hitting area in centimeters squared. |
| Head Area, Sq. Inch | 97.0 | The advertised hitting area in inches squared. |
| Number of Main Strings | 18 | The main strings are the vertical strings when looking at a standing racquet. Typically the longest strings. |
| Number of Cross Strings | 20 | The cross strings are the horizontal strings when looking at a standing racquet. Typically shorter. |
| Ratio Cross/Mains | .687 | The natural ratio of the string pattern (calculated). |
| Main String Grid | 7.25 | The total distance between right and left main string. |
| Cross String Grid | 10.18 | The total distance between the first cross string and the last cross string. |
| Density (% of head filled with string) | .783 | |
| Average Cross String Space | .509 | The higher this number the more the string will move. This number is used to help select the best string setup. |
| Average Main String Space | .403 | The higher this number the more the string will move. This number is used to help select the best string setup. |
| Properties of a moving racquet. | ||
| Dynamic Tension, Kp, ERT | 37 | This is the stiffness of a string bed in kilograms per centimeter based on a frequency. |
| Dynamic Tension, Lbs/in | 206.94 | This is the above converted to pounds per inch. |
| First Moment, Nm | .831 | This is how heavy the racquet feels in the hand. The higher the number the heavier the racquet will feel. |
| Polar Moment | 340 | This is the resistance to rotating about the center of the racquet on, say a mimes-hit. The higher the better. |
| Torsional Stability | 16 | This is the derived stability number. The higher the better within reason. Anything below 14 would need some help. |
| Swing Weight, Kg/cm2 | 324 | This is the "inertia" of the racquet and probably the most important number in the review! The higher the number the more momentum through the ball but less manueverability. |
| Swing Weight, Ounces | 11.43 | |
| Swing Weight Calculated | 348.4 | This number will be larger than the previous swing weight because it is calculated from the very end of the racquet as if there is no one holding it. A very important number. |
| Power, RDC | 42 | Calculated by the RDC. High is 100 |
| Control, RDC | 59 | Calculated by the RDC. High is 100 |
| Manueverability, RDC | 71 | Calculated by the RDC. High is 100 |
| Power, Calculated | 1740.5 | This number is calculated based on a bunch racquet properties, Including length. |
| Head Points | 6.46 (negative = head heavy) | This number is how positive or negative the balance is. A "point" is ⅛ of an inch so this racquet is a little over ¾ of an inch head light. |
| Head Weight, % | 47.0% | Calculated based on weight distribution and length. |
| Center of Percussion | 21.0 | This is the spot on the string bed that returns a "solid" hit. |
| Dwell Time, ms | 8.50 | This is how long the ball and string are in contact with no swing. A big swing will reduce this number by about half. |
| Efective Stiffness - lbs | 28.2 | This number is calculated from the string bed stiffness and the racquet stiffness. Anything under 30 will be "soft" feeling and over 35 will be "harsh". |
| K, Lb/In | 179.5 | This is how many pounds it takes to deflect the string bed one (1) inch. |
| Recoil Weight | 160.8 | This number is the racquets resistance to rotating backward. The higher the number the better for volleys. |
| Twist Weight | 230.8 | This is the racquets resistance to twisting in your hand. The higher the better. |
| End Weight | 139.8 | This weight is used to calculate the precise balance of the racquet. |
| Tip Weight | 196.2 | This weight is used to calculate the precise balance of the racquet. |
| 9 O'Clock | 100.4 | This is the weight of that position on the racquet head and is used for precise customization. |
| 3 O'Clock | 99.6 | This is the weight of that position on the racquet head and is used for precise customization. |
| Butt Cap | 135.6 | This is the weight of that position on the racquet and is used for precise customization. |
Correct Size Does Matter!
Grip size, in this case, does matter! However, for several years the largest grip size available has been a 4 ⅝, or just 5 for short.
This is simply the circumference of the finished grip forward of the butt cap. Of course the butt cap is of a size that will capture the butt of your hand for comfort and control.
But what happens if you need a grip size larger than 4 ⅝? In years gone by a shrink tube was applied to the current grip pallet and the size was increased accordingly. Typically only two (2) shrink tubes could be used and even then the grip facets became “rounded”.
Lucky for us, and you of course, we can now print grip pallets in any size required! The largest one so far is a 5 1/4 for a player in New York using a Babolat Pure Aero.
-
- From this to…
-
- …This!
-
- Pallet with Butt Cap
-
- Raw Shaft
-
- Previous Grip Pallet
Each printed pallet is made specifically for a racquet, not just a “one size fits all” approach due to very subtle variations in size, especially the inner shaft.
Inner Shaft
In this case the pallets were longer to accommodate large hands so the length of the racquet was increased through the use of these pallets and a printed extender.
The printed pallet must fit securely and the best way to assure the fit is to have the racquet.
Pallet with Butt Cap
What Can String Failure Tell Us – Part Deux
In Part Un we discussed the difference between shanking (mis-hit) and friction failure. It was obvious that the string was broken. But what happens when it is not so obvious?
Part Deux, this part, will examine the frictional notching failure of monofilament string and how we can be prepared for it! To further refine this discussion we will be comparing PET polyester has PEEK monofilament string. The reason is that each material while both will notch one requires more time to reach the critical dimensional decrease that is a failure!
In almost every Racquet Quest Podcast we talk about tension v string diameter and agree that once 50% of the string diameter is notched away the string is vulnerable! So a .050 (1.27mm) diameter string that has a tensile strength of 120 pounds at 50% notching will have 60 pounds of tensile strength remaining.
Notched v un notched string
This graph is a string that was broken during use. The string was removed from the racquet. The top line is the tensile strength in the area of no notching so you can see that it is pretty strong still and has stabilized due to use. That stabilization is indicated by the very tight stress/strain grouping.
However, things go sideways when the notched area of the string is put under stress. The string failed at a force of 63.8 pounds, or about 59% of the used tensile strength. Not bad!
So, notching is failure-inducing but how long it takes to create the fatal notch differs with string material. This particular set of strings had about six (6) hours of play.
In Part Trois, we will look at PEEK material under the same conditions!
What Can String Failure Tell Us?
Well, in the simplest terms, failure tells us it is time to have the request strung! However, there may be subtleties in string failure that can help us in our quest for tennis racquet performance.
Such as?
Is the failure shear related or tensile strength related? Was friction the major contributor to the failure? Where did the failure occur (on the racquet, not the court)? Was the failure during play or in the bag?
Shear-related failure is when the string breaks very near the racquet frame. This failure is called a mis-hit or shank! It is like cutting the string with a pair of scissors!
Shear Failure
Friction Failure
Friction failure is caused by just that, friction! Friction is caused by the string moving on each other. That rubbing creates friction and notches the string where it will fail.
If the racquet failed during play and it is not shear-related, the tensile strength of the string was exceeded. If a string has a tensile strength of 120 pounds and the tension is 60 pounds leaving 60 pounds to be used to hit the ball. Some big hitters can generate at least that much force on a solid forehand!
This graph shows the tensile strength of the string to be about 115 pounds. Given the movement of this string-on-string, the frictional notching can contribute to relatively early failure based on the hitters force.
This graph shows the tensile strength of the string to be about 155 pounds but it has to travel (stretches) further to reach that force.
So, you can see, with this information we can make better decisions when asked to suggest a string, or strings, for a client!
Players String Evaluation
For years we have requested player evaluation input to help us provide a comprehensive selection of quality tennis racquet string.
Our new Player String Evaluation form below makes it really quick and easy to give us your evaluation input. If Racquet Quest prepared your racquet there will be two (2) labels on the inside of the racquet shaft. One label will be your name with date, string, tension, and racquet number. The other label will be a bar code that includes the racquet number.
You can use this information when filling out the Player String Evaluation form. Thank you for your input!
Which Comes First!
We all have heard the question “which comes first the chicken or the egg”? However, my question is “Which comes first the game or the string”?
I believe they happen simultaneously. But first a quick story.
In 2005 I was attending a Head product introduction on the island of Mallorca, Spain, Yes, that one!
The product introduction was exciting but what I am going to tell you about now was even more meaningful.
The Director of one of the top US Tennis Training organizations, at that time, was there and we were discussing teaching techniques and what he said after being in this part of Europe was “we need to start teaching our players how to hit this way!” Well, “this way” was the way of low-powered strings that were popular in Europe but not so much in the US, yet.
So, it began! The players could not hit harder, like the Europeans, unless they used the same string material as the Europeans and that was very stiff and mostly PET polyester.
So, the idea was the “egg” and the string was the “chicken”, sort of! I guess the feeling was that “if Americans are going to compete we must use the same equipment”.
Now, I believe the professional game can go on about its way but otherwise, we need to consider changing the game by returning to a combination of comfort and playability.
Our history shows us that the “high performance” life span of many polyester strings is about 2-3 hours, or less, maybe about 10-12 games. We don’t believe this is quite long enough for most players. But, how do you quantify “performance”? It may be different things for different players.
There are many components to performance but what if it was associated with UTR data? Racquet Quest can track UTR numbers and make some determinations based on that data. If a UTR is stable or increasing it is a good bet that the performance of the player and equipment is OK. However, if the UTR is slipping it is a good indication that something is not working as it should…but what?
We have found that, in some cases, it is injury or discomfort, that is causing the slippage! Stop it! The following data is for a 12 month period and acquired from the UTR website. Even small positive changes are tough! But negative changes seem to have an enormous impact more quickly than positive changes!
For example:
| Player | Racquet | String | UTR1 | UTR2 | Delta |
|---|---|---|---|---|---|
| A | Head Speed | PEEK | 12.84 | 12.86 | + .02 |
| B | Babolat Pure Aero | Polyester | 10.91 | 9.56 | -1.35 |
| C | Head Radical MPA | PEEK | 4.50 | 5.61 | +1.11 |
| D | Wilson Pro Staff 97 | PEEK | 5.0 | 7.03 | +2.03 |
| E | Babolat Pure Aero | PEEK | 3.8 | 5.64 | +1.84 |
| F | Wilson Blade 98 | Polyester | 10.0 | 9.41 | -.59 |
| G | Head Radical Pro | Natural Gut | 3.7 | 5.15 | +1.45 |
Bolt 100 v2
Bolt tennis racquets have been around for a few years and we have reported on them in the past, however, the new V2 of the Bolt racquet lineup is very impressive!
If you are not at all familiar with the Bolt technology it is the “Zip Strip” that makes them unique. The “Zip Strip” is a carbon fiber component that looks like a miniature tennis racquet cross-section that fits into the sides and top that actually do the “bending” during string and racquet impact!
This “bending” can mitigate harshness associated with very stiff strings or a very stiff racquet!
Before we look at the specifications you can visit the Bolt site for more information.
| Bolt 98L, V2 | |
|---|---|
| Manufacturer | Bolt |
| Racquet Model | Bolt 100, v2 |
| Reference Tension | 57 lbs - 25.9 k |
| String: Main/Cross | Head Reflex |
| Machine Used | True Tension Pro |
| ASPS, RDC | 56 |
| ASPS, FlexFour | 64.5 |
| Racquet Flex, RDC | 64 - After stringing |
| Racquet Flex, FlexFour | 46 |
| Weight, Grams | 313 |
| Weight, Ounces | 11.06 |
| Balance, mm | 337 |
| Balance, Inch | 13.27 |
| Length, Cm | 68.5 |
| Length, Inch | 26.98 |
| Head Width | 9.589 |
| Head Length | 13.13 |
| Head Area, cm2 | 665.1 |
| Head Area, Sq. Inch | 103.1 |
| Beam Width, mm, Shaft, Center, Tip | 24.5, 24.5, 23.8 |
| In Plane Stiffness, Pounds/In | 454 Lbs/In. |
| In Plane Stiffness, Kg/cm | 178.7 Kg/cm |
| Number of Main Strings | 16 |
| Number of Cross Strings | 19 |
| Ratio Cross/Mains | .642 |
| Main String Grid | 7.37 |
| Cross String Grid | 9.62 |
| Density (% of head filled with string) | .688 |
| Average Cross String Space | .506 |
| Average Main String Space | .461 |
| Dynamic Tension, Kp, ERT | 36 |
| Dynamic Tension, Lbs/in | 201.35 |
| First Moment, Nm | .822 |
| Polar Moment | 350 |
| Torsional Stability | 19 |
| Swing Weight, Kg/cm2 | 331 |
| Swing Weight, Ounces | 11.68 |
| Swing Weight Calculated | 356.6 |
| Power, RDC | 48 |
| Control, RDC | 53 |
| Manueverability, RDC | 66 |
| Power, Calculated | 2183.7 |
| Head Points | 1.42 (negative = head heavy) |
| Head Weight, % | 49.3% |
| Center of Percussion | 21.4 |
| Dwell Time, ms, No Swing | 8.50 |
| Effective Stiffness - lbs | 29.9 |
| K, Lb/In (SBS) RDC | 179.49 |
| Recoil Weight | 157.0 |
| Twist Weight | 234.11 |
| End Weight | 118.7 |
| Tip Weight | 196.1 |
| Total Weight | 314.8 |
| 9 O'Clock | 103.0 |
| 3 O'Clock | 98.9 |
| Butt Cap | 110.3 |
| Total Weight | 312.2 |
Friction v Tension…what wins?
We all know what friction is. It keeps our cars from sliding around, it keeps us from slipping and in general makes movement possible!
Friction also plays an important part in the string bed of your tennis racquet. Friction between the strings and the ball create friction which in turn creates rotation.
What are, however, some of the downsides of friction in the string bed during, and after, the stringing process?
Friction v Tension
For more detailed information and a graph showing the forces involved go to our membership site, GASP.network, but in the meantime this image will show the frictional forces at work!
This machine tension head will pull the string (blue) in the direction of the center of the racquet support structure instead of directly out the middle of the grommet.
It is obvious that this will create considerable friction and result in lower tension inside the grommet than outside the grommet.
The Extreme MP is Back!
The very popular Head Graphene 360+ Extreme MP is back in stock! This racquet is one of the best all-around racquets that we have seen in a while! They are hard to keep in stock!
Head Graphene 360+ Extreme MP
In addition to the stock models, we also have Extreme MP for full custom racquet set up, so whatever you want! Stock or custom!
But hurry…
Looking at the Differences
For the past fifteen (15) years or so, most string discussion centered on polyester. By now, you know our position on polyester, so we won’t go through that again right now. What we will go through right now is the difference(s) in a polyester string!
PET, polyethylene terephthalate, is the standard “material” in the better quality polyester string, so how can there be so many different versions of the same material?
Can you say “additives”? Luxilon has made it part of their brand to use acronyms for materials in each string’s description. ALU, for example, is aluminum, Timo is titanium/molybdenum, and I don’t know what 4G is.
So let’s take a look at the differences in a couple of polyester stings. Shown here are two (2) polyester strings, Luxilon ALU Power and Volkl V-Star. You can see the difference in stiffness between them, the V-Star being “softer,” but what you can’t see is the V-Star package does not say “co-polyester” but instead Co-Polymer!
Polyester? Co-Polyester? Co-Polymer?
We know “co” is two or more and “poly” is many, so how many of anything does any material have in it? We may never know and probably shouldn’t care as long as we have the presented data.
What can we see from this graph?
- ALU Power reaches 50 lbs quicker (stiffer)
- ALU Power exhibits good elasticity
- V-Star is more linear (consistency)
- V-Star has a greater tensile strength
- V-Star is softer (takes longer to reach 50 lbs)
How would a player know this by just looking a the package? I am not sure! Adding the word “soft” or “comfort” or “feel” may persuade a player to try the string, but what if a better decision could be made before spending the time and money?
Head Graphene 360+ Radical S v21
From our perspective the Radical S should be one of the most used of the Radical Series!
Head Graphene 360+ Radical S
Why? The 102 square inch head size is optimum for players looking for additional power,( and who isn’t) in a legitimate players racquet. We say “legitimate” because this racquet can be turned into any thing you want, now or in the future!
As you will see in the specifications this is not a really stiff racquet so it will be easy for many players to customize the string bed to suit current playing style with an eye toward becoming a more aggressive player, or not!
The Radical S continues with the “control pattern” and “sound grommets”. We are not totally certain what the “sound grommets” do but sound is frequency and frequency can be felt so maybe the grommets are damping out some of the higher frequencies?
Anyway, this Radical S model is a great step into the “performance” racquet arena with plenty of room to grow!
| Head Graphene 360+ Radical S v21 | |
|---|---|
| Manufacturer | Head |
| Racquet Model | Head Graphene 360+ Radical S v21 |
| Reference Tension | 55 lbs - 24.9 k |
| String: Main/Cross | Victrex 7718 |
| Machine Used | TT Professional |
| ASPS, RDC | 55 |
| ASPS, FlexFour | 61.5 |
| Racquet Flex, RDC | 61 - After stringing |
| Racquet Flex, FlexFour | 50 |
| Weight, Grams | 296 |
| Weight, Ounces | 10.44 |
| Balance, mm | 333 |
| Balance, Inch | 13.11 |
| Length, Cm | 68.5 |
| Length, Inch | 26.968 |
| Head Width | 9.860 |
| Head Length | 13.09 |
| Head Area, cm2 | 653.9 |
| Head Area, Sq. Inch | 101.3 |
| Beam Width, mm, Shaft, Center, Tip | 22, 25, 23 |
| In Plane Stiffness, Pounds/In | 370.4 Lbs/In |
| In Plane Stiffness, Kg/cm | 66.2 Kg/cm |
| Number of Main Strings | 16 |
| Number of Cross Strings | 19 |
| Ratio Cross/Mains | .634 |
| Main String Grid | 7.30 |
| Cross String Grid | 9.75 |
| Density (% of head filled with string) | .703 |
| Average Cross String Space | .513 |
| Average Main String Space | .449 |
| Dynamic Tension, Kp, ERT | 35 |
| Dynamic Tension, Lbs/in | 195.8 |
| First Moment, Nm | .764 |
| Polar Moment | 320 |
| Torsional Stability | 17 |
| Swing Weight, Kg/cm2 | 303 |
| Swing Weight, Ounces | 10.69 |
| Swing Weight Calculated | 328 |
| Power, RDC | 42 |
| Control, RDC | 60 |
| Manueverability, RDC | 85 |
| Power, Calculated | 1873.1 |
| Head Points | 2.99 (negative = head heavy) |
| Head Weight, % | 48.6% |
| Center of Percussion | 21.2 |
| Dwell Time, ms, No Swing | 8.58 |
| Effective Stiffness - lbs | 28.9 |
| K, Lb/In (SBS) RDC | 176.28 |
| Recoil Weight | 144.50 |
| Twist Weight | 214.65 |
| End Weight | 113.1 |
| Tip Weight | 183.4 |
| Total Weight | 296.5 |
| 9 O'Clock | 92.1 |
| 3 O'Clock | 91.8 |
| Butt Cap | 112.2 |
| Total Weight | 296.1 |
Head Graphene 360+ Radical Series Comparative Data
Click Here to See Radical Series Comparison Data
Radical MP v21
A Close Look at Orange
The new, for 2021, Head Graphene 360+ Radical series is a radical step into colors that have always been the “mark” of the Radical Series but now it has gone even further into radicalism!
We think that is a good thing! Why mess around with just a little orange when you can go all out!
It is impossible to see the vibrancy of this orange without holding it in your hand! We invite to to hold one in your hand and even hit with it!
The Radical MP has been the most popular model over the years. This model has all the attributes of the Pro without the added weight, (which can be added later if needed)!
The thin beam carries over to the MP and Pro while the S has a slightly wider beam.
The S model fits the very necessary range of 102 square inch racquets because Head has, correctly, reduced the number of head sizes per model. The Speed series has the 100 square inch head size very well covered.
You will see all the specifications on each individual review that will be posted shortly.
Head Graphene 360+ Radical Pro
Head Graphene 360+ Radical S
Head Graphene 360+ Radical Pro v21
As you would expect the Radical Pro is the heaviest of the Radical Series, but only by a few grams! What! When we talk about grams to some players it might as well be angstroms or something like that. What the heck is a gram? For many in the US market is still “Talk to me in ounces, please!”
OK, there are 454 grams in a pound and 16 ounces in a pound. If I said a racquet weighs 285 grams what would you think? Or, if I said the racquet weighs 10 ounces which sounds better if you are weight averse?
OK, the Radical Pro weighs 13 grams more than the Radical MP so how many ounces is that?
Enough of this stuff! However, it is important to know what weight is and how it can be a significant factor in your playing. Weight is your friend!
As you will see in the following specifications a lot depends on how the weight is distributed throughout the racquet.
Head Graphene 360+ Radical Pro
Here is a little hint; take a look at the swing weight of the MP and the Pro and tell me what you see.
The Radical Pro has the “sound grommets’ and the “control pattern” for those concerned with string spacing, and that should be many of you. String spacing can have a profound affect on durability and playability.
The enlarged circle was intended to show the elongated grommets which allow the string to move and effectively be a little longer meaning more energy return.
| Manufacturer | Head |
| Racquet Model | Head Graphene 360+ Radical Pro v21 |
| Reference Tension | 55 lbs - 24.9 k |
| String: Main/Cross | Victrex 7718 |
| Machine Used | TT Professional |
| ASPS, RDC | 54 |
| ASPS, FlexFour | 63.5 |
| Racquet Flex, RDC | 63 - After stringing |
| Racquet Flex, FlexFour | 53 |
| Weight, Grams | 328 |
| Weight, Ounces | 11.57 |
| Balance, mm | 321 |
| Balance, Inch | 12.64 |
| Length, Cm | 68.5 |
| Length, Inch | 26.968 |
| Head Width | 9.627 |
| Head Length | 12.80 |
| Head Area, cm2 | 624.3 |
| Head Area, Sq. Inch | 96.8 |
| Beam Width, mm, Shaft, Center, Tip | 20, 23, 21 |
| In Plane Stiffness, Pounds/In | 400.0 Lbs/In. |
| In Plane Stiffness, Kg/cm | 71.5 Kg/cm |
| Number of Main Strings | 16 |
| Number of Cross Strings | 19 |
| Ratio Cross/Mains | .633 |
| Main String Grid | 7.25 |
| Cross String Grid | 9.40 |
| Density (% of head filled with string) | .688 |
| Average Cross String Space | .490 |
| Average Main String Space | .445 |
| Dynamic Tension, Kp, ERT | 35 |
| Dynamic Tension, Lbs/in | 195.8 |
| First Moment, Nm | .808 |
| Polar Moment | 324 |
| Torsional Stability | 14 |
| Swing Weight, Kg/cm2 | 310 |
| Swing Weight, Ounces | 10.93 |
| Swing Weight Calculated | 338 |
| Power, RDC | 47 |
| Control, RDC | 54 |
| Manueverability, RDC | 80 |
| Power, Calculated | 1889.7 |
| Head Points | 6.77 (negative = head heavy) |
| Head Weight, % | 46.9% |
| Center of Percussion | 20.8 |
| Dwell Time, ms, No Swing | 8.66 |
| Effective Stiffness - lbs | 29.1 |
| K, Lb/In (SBS) RDC | 173.06 |
| Recoil Weight | 152.11 |
| Twist Weight | 227.78 |
| End Weight | 136.1 |
| Tip Weight | 191.5 |
| Total Weight | 327.6 |
| 9 O'Clock | 98.8 |
| 3 O'Clock | 97.5 |
| Butt Cap | 131.3 |
| Total Weight | 327.6 |
Head Graphene 360+ Radical MP v21
Well, this is one way to get 2021 of to a great start! This eye popping Radical will certainly add excitement to your life!
This is truly orange with capitol O! You simply need to see this racquet to really appreciate the color.
Radical MP v21
But, color aside, this racquet continues the Radical silo of aggressive racquets for the aggressive player, or those that want to be!
This review is the MP which has been one of the most popular models over the years and I am happy to say they have not messed it up as is so often the case when introducing new products! This is a real Radical racquet!
A couple of things really stand out. First the string pattern is more dense in the center of the racquet by a small amount which allows for a more open pattern at the periphery for more comfort.
The top eight (8) grommets are on a separate insert and they are “straight” instead of radial.
The addition of “sound grommets” is intended to enhance power via greater string movement. and optimize sound and vibrations.
And the “in plane” stiffness is a little lower meaning the string bed stiffness may be slightly less at the same reference tension, also contributing to comfort.
If you are looking for a high performance tennis racquet that has room for some weight as you require it, this is the one. If you already need more weight that will be the Radical Pro that will be reviewed next.
| Manufacturer | Head |
| Racquet Model | Head Graphene 360+ Radical MP V21 |
| Reference Tension | 55 lbs - 24.9 k |
| String: Main/Cross | Victrex 7718 |
| Machine Used | TT Professional |
| ASPS, RDC | 55 |
| ASPS, FlexFour | 67 |
| Racquet Flex, RDC | 63 - After stringing |
| Racquet Flex, FlexFour | 50 |
| Weight, Grams | 315 |
| Weight, Ounces | 11.11 |
| Balance, mm | 330 |
| Balance, Inch | 12.99 |
| Length, Cm | 68.5 |
| Length, Inch | 26.968 |
| Head Width | 9.625 |
| Head Length | 12.81 |
| Head Area, cm2 | 624.7 |
| Head Area, Sq. Inch | 96.8 |
| Beam Width, mm, Shaft, Center, Tip | 20, 23, 21 |
| In Plane Stiffness, Pounds/In | 382.2 Lbs/In. |
| In Plane Stiffness, Kg/cm | 68.3 Kg/cm |
| Number of Main Strings | 16 |
| Number of Cross Strings | 19 |
| Ratio Cross/Mains | .633 |
| Main String Grid | 7.13 |
| Cross String Grid | 9.31 |
| Density (% of head filled with string) | .677 |
| Average Cross String Space | .484 |
| Average Main String Space | .445 |
| Dynamic Tension, Kp, ERT | 35 |
| Dynamic Tension, Lbs/in | 195.8 |
| First Moment, Nm | .803 |
| Polar Moment | 330 |
| Torsional Stability | 17 |
| Swing Weight, Kg/cm2 | 313 |
| Swing Weight, Ounces | 11.04 |
| Swing Weight Calculated | 343 |
| Power, RDC | 46 |
| Control, RDC | 55 |
| Manueverability, RDC | 78 |
| Power, Calculated | 1909.3 |
| Head Points | 3.94 (negative = head heavy) |
| Head Weight, % | 48.2% |
| Center of Percussion | 20.9 |
| Dwell Time, ms, No Swing | 8.58 |
| Effective Stiffness - lbs | 29.4 |
| K, Lb/In (SBS) RDC | 176.28 |
| Recoil Weight | 148.6 |
| Twist Weight | 218.8 |
| End Weight | 125.1 |
| Tip Weight | 190.7 |
| Total Weight | 329.2 |
| 9 O'Clock | 96.8 |
| 3 O'Clock | 96.7 |
| Butt Cap | 120.0 |
| Total Weight | 313.5 |
Questron Update!
Questron has been operational at the World Headquarters of Racquet Quest for a few weeks and it is time to acknowledge the benefit of having Questron and the ones that made it possible!
Dr, Rich Zarda and Shenghong Zhang are responsible for actually getting it done! Dr. Zarda was instrumental in determining what need to be tested and Shane actually did the assembly and programming of the UI! An extraordinary effort by both!
Our good friend JC Carpentier at Tennis machines in St. Louis pitched in with the perfect string connection points which make Questron function in a way that does not stress the string at the connection points. We want the string to fail (break) in the middle. Thank you, JC!
So, all I have to do is insert the test string and watch! The image below is a graph recorded for each string that is tested, and two (2) strings can be overlayed to see the difference between them.
This graph was just pulled at random so you can see the output.
This information is incredibly helpful and will become even more helpful as the database grows.
My sincere thank you to everyone that got this done!
Connector
A Rarity …Continued
It is fun to have these fairly rare racquets to work on and get back into playing condition! We will report on each of them as we go through the setup procedure, and note any differences that we find.
We will try to compare some of the specifications to current or “recently current” racquets to see how far we have come…or not!
-
- Remember me?
-
- Austrian Twin Tube
-
- Original TK57 Pallet
-
- New Butt Caps
A few things stand out right away:
- The racquet is nearly 28 inches long (71.1cm)
- The racquet is very flexible in (RDC48) and out (285.7) of plane
- The racquet has a straight thin (21mm) beam
- The racquet is (was) made in Austria
| Head Radical Tour OS - Austria | |
|---|---|
| Manufacturer | Head |
| Racquet Model | Head Radical Tour OS - Austria |
| Reference Tension | 58 lbs - 26.3 k |
| String: Main/Cross | Polyester |
| Machine Used | TT Professional |
| ASPS, RDC | 64 |
| ASPS, FlexFour | 63 |
| Racquet Flex, RDC | 48 - After stringing |
| Racquet Flex, FlexFour | 44 |
| Weight, Grams | 352 |
| Weight, Ounces | 12.42 |
| Balance, mm | 329 |
| Balance, Inch | 12.95 |
| Length, Cm | 71.1 |
| Length, Inch | 27.992 |
| Head Width | 10.23 |
| Head Length | 13.43 |
| Head Area, cm2 | 695.9 |
| Head Area, Sq. Inch | 107.9 |
| Beam Width, mm, Shaft, Center, Tip | 21, 21, 21 |
| In Plane Stiffness, Pounds/In | 285.7 Lbs/In. |
| In Plane Stiffness, Kg/cm | 51.1 Kg/cm |
| Number of Main Strings | 18 |
| Number of Cross Strings | 19 |
| Ratio Cross/Mains | .721 |
| Main String Grid | 7.81 |
| Cross String Grid | 10.12 |
| Density (% of head filled with string) | .733 |
| Average Cross String Space | .533 |
| Average Main String Space | .434 |
| Dynamic Tension, Kp, ERT | 37 |
| Dynamic Tension, Lbs/in | 206.94 |
| First Moment, Nm | .894 |
| Polar Moment | 389 |
| Torsional Stability | 20 |
| Swing Weight, Kg/cm2 | 369 |
| Swing Weight, Ounces | 13.03 |
| Swing Weight Calculated | 381 |
| Power, RDC | 36 |
| Control, RDC | 66 |
| Manueverability, RDC | 41 |
| Power, Calculated | 2063.3 |
| Head Points | 8.35 (negative = head heavy) |
| Head Weight, % | 46.3% |
| Center of Percussion | 22.0 |
| Dwell Time, ms, No Swing | 7.96 |
| Effective Stiffness - lbs | 27.4 |
| K, Lb/In (SBS) RDC | 205.13 |
| Recoil Weight | 186.9 |
| Twist Weight | 273.6 |
| End Weight | 139.3 |
| Tip Weight | 213.3 |
| Total Weight | 352.6 |
| 9 O'Clock | 106.3 |
| 3 O'Clock | 106.0 |
| Butt Cap | 140.7 |
| Total Weight | 353 |
Consistency. What Does It Look Like?
Consistency!
Consistency is a component of almost every successful thing we do each day!
But, what does it look like? Well since this is a tennis centric post it will look like this:
What you are looking at is identical racquets, identical string, identical failure location!
If you find the very end of each string you will see how consistent this failure location is.
This string is a high elongation material so will notice that the ends of the broken strings are very far apart.
This is a good thing since it (elongation) contributes to comfort and power when hitting the ball.
This failure location indicates the player is striking the ball with consistency! That many explain the UTR of 13.3!
What else does this failure location show us?
- Most impacts are not in the center of the racquet.
- The string spacing in this area is a little more “open” which may “catch” the ball and contribute to rotation.
- There are more strings for the ball to “roll” over before leaving the racquet which may contribute to rotation.
Consistency is important in everything we do. Visualize it like the string bed of this racquet and try to hit the same spot each time you do something…anything!
See What We are Talking About?
If you have been listening to the Racquet Quest Podcast you know we have talked about what to NOT accept when you pick up your newly strung racquet.
We know it is hard to visualize sometimes so these pictures are posted to give you a visual aid! This is the very same string! One could conclude from these images that the person responsible for these knots has not had any training at all. It makes you wonder how good the rest of the string job is!
Bad Knot
In the interest of improving all stringing, please do not accept this kind of work.
The image below shows the “dreaded” crossover! This is not only a potential string damaging error it indicates a lack of skill, or understanding, of doing a good job!
Of course, mistakes do happen but it is the responsibility of the stringer, in this case, to correct the mistake before the client comes to collect their racquet!
Be Prepared!
Be Prepared!
It sure sounds simple but is it? Not really! When talking about tennis preparedness that means having enough racquets ready for the tournament, organizing training sessions, plenty of shirts, shoes, and socks, of course!
But, what’s missing?
Your string is missing! Sure, you have done a great job of getting your racquets ready but I don’t see several sets of the string you use in the bag! Why not? You may believe they will have it at the tournament site, and, if you are using a commodity string, you may be right!
But what if you’re using a high performance string that is set up for your playing style?
- Take a few sets of your preferred string with you. I prefer sets over reels but that is up to you.
- Tell the stringer exactly what you want. That means knowing what you want so be prepared!
- Request that your racquet be strung using two (2) pieces of string and the cross strings be started at the top of the racquet. No exceptions! No ATW’s, No natural one-piece, simply two pieces top to bottom!
Know how to identify the correct stringing procedure and don’t accept anything that is not up to your standards!
Most qualified stingers will appreciate your input and do the proper job for you!
Today a racquet came in that was strung at a tournament that missed the mark! One-piece ATW, sloppy knots, distorted head shape, and a string that is not used by the player!
That is why we are posting this… “Be Prepared”
What’s in a Name!
In this particular case, it is the name “Roger Federer” and the racquet that carries his name, or just about!
When you hear about the Wilson Pro Staff 97 his name comes to mind as well as the thought “I can’t possibly play with his racquet”. Well, maybe not but there is really good news!
You don’t have to play with “his” racquet to get the benefits of the Pro Staff concept!
The Wilson Pro Staff 97, V13, is that racquet you have been looking for if you want:
- The really good overall weight of 339 grams (11.9 ounces)
- The very easy to handle swing weight of 314 (11.1 ounces)
- A reasonable stiffness of 64 RDC
Only the sharpest of eyes will notice the subtle differences between this racquet and that RF97 Autograph.
This Pro Staff returns to the classic Pro Staff accent colors of red and yellow. The red butt cap is a small concession to the lighter racquet with it’s more hand-friendly smooth edges.
| Wilson Pro Staff 97, V13 | |
|---|---|
| Manufacturer | Wilson |
| Racquet Model | Wilson Pro Staff 97, V13 |
| Reference Tension | 55 lbs - 24.9 k |
| String: Main/Cross | MonoGut ZX Pro |
| Machine Used | TT Professional |
| ASPS, RDC | 51 |
| ASPS, FlexFour | 61 |
| Racquet Flex, RDC | 64 - After stringing |
| Racquet Flex, FlexFour | 49 |
| Weight, Grams | 339 |
| Weight, Ounces | 11.96 |
| Balance, mm | 317 |
| Balance, Inch | 12.48 |
| Length, Cm | 68.5 |
| Length, Inch | 26.968 |
| Head Width | 9.625 |
| Head Length | 12.77 |
| Head Area, cm2 | 622.9 |
| Head Area, Sq. Inch | 96.5 |
| Beam Width, mm, Shaft, Center, Tip | 22, 22, 22 |
| In Plane Stiffness, Pounds/In | 468 Lbs/In. |
| In Plane Stiffness, Kg/cm | 212 Kg/cm |
| Number of Main Strings | 16 |
| Number of Cross Strings | 19 |
| Ratio Cross/Mains | .635 |
| Main String Grid | 7.40 |
| Cross String Grid | 10.51 |
| Density (% of head filled with string) | .779 |
| Average Cross String Space | .546 |
| Average Main String Space | .453 |
| Dynamic Tension, Kp, ERT | 35 |
| Dynamic Tension, Lbs/in | 195.8 |
| First Moment, Nm | .821 |
| Polar Moment | 330 |
| Torsional Stability | 16 |
| Swing Weight, Kg/cm2 | 314 |
| Swing Weight, Ounces | 11.08 |
| Swing Weight Calculated | 340.7 |
| Power, RDC | 51 |
| Control, RDC | 49 |
| Manueverability, RDC | 77 |
| Power, Calculated | 1940.2 |
| Head Points | 8.03 (negative = head heavy) |
| Head Weight, % | 46.3% |
| Center of Percussion | 20.7 |
| Dwell Time, ms, No Swing | 8.91 |
| Effective Stiffness - lbs | 28.4 |
| K, Lb/In (SBS) RDC | 163.46 |
| Recoil Weight | 157.6 |
| Twist Weight | 235.6 |
| End Weight | 144.5 |
| Tip Weight | 194.3 |
| Total Weight | 338.8 |
| 9 O'Clock | 97.6 |
| 3 O'Clock | 98.4 |
| Butt Cap | 141.6 |
| Total Weight | 337.6 |
Let’s Get Serious!
If you listen to the Racquet Quest podcasts you will recognize this statement!
So, why are we posting it on the website if it is already a podcast? Because it is serious! A racquet came in today that reminded me of why we started GASP! The stringing is so awful that I can’t keep myself from writing this!
The owner of the racquet does not remember at which tournament it was strung otherwise we could contact them and offer some suggestions!
Why is this racquet so bad?
- Inconsistent tension across the string bed
- The accuracy index is 65!
- Virtually no tension in the top cross string…because
- The racquet was strung from the bottom up plus the poor knot
- Stringing of the crosses started at the bottom (starting X at the top is highly recommended)
- Tie offs on the wrong holes
- 8M is better
- Cross over at the lower side
- Probably due to the wrong tie off
- One-piece format
- Inconsistent string tension
- Bad tie off knots
Why is it so hard to do a better job when stringing a tennis racquet? In this case, it appears the stringer has no training. There are errors no competent stringer would make! But, until players refuse to accept this shoddy work it will continue!
-
- Wrong Tie Off Hole
-
- Cross Over
-
- Bad KNot
-
- Another Really Bad Knot
-
- No Tension on the First Cross String
Why “demo” a Racquet?
We have had this discussion before, but it needs repeating periodically!
Why? Because players are not, in some cases, getting what they want but thought they were. And whose fault, or oversight, is that? The racquet dealer, the player, advertising, or just bad luck?
I say it is the “demo” process in general! As we have discussed before the demo racquet your receive from online or even a local store is probably not set up for you! So you are “demoing” something that may not be even close to what you want or need! This can be costly!
Probably more costly than demoing a racquet that is set up for you! It will cost at least one stringing of the string of your choice…your choice, not anyone else’s choice! The tension will be what you want, not anyone else. The weight and swing weight will be set up for you, not anyone else…so you see where this is going! Spending $50.00 may save you $100’s if a “poor” selection is made!
After you have had the demo racquet set up for you it is important that you try it as many times as possible, but at least three (3) sessions.
The objective of a demo program is to get the correct racquet for you so take advantage of the “set up” opportunity!
Bolt 98L
The Bolt Racquet Series is back and in a very good way!
In case you don’t remember the Bolt racquets incorporate a patented Zip Strip that sits between the racquet and the string that mitigates the stiffness of the string bed somewhat.
I mention this because the In-Plane stiffness number you will see in the review shows a single number, and in fact for testing devices that number will be nearly the same with and without the Zip Strip interaction.
The Zip Strip will produce an “effective” hitting area larger than the measured racquet head size.
| Bolt 98L, V2 | |
|---|---|
| Manufacturer | Bolt |
| Racquet Model | Bolt 98L, V2 |
| Reference Tension | 55 lbs - 24.9 k |
| String: Main/Cross | Head Lynx/Head Reflex |
| Machine Used | Babolat Racket Station |
| ASPS, RDC | 60 |
| ASPS, FlexFour | 67.5 |
| Racquet Flex, RDC | 61 - After stringing |
| Racquet Flex, FlexFour | 36 |
| Weight, Grams | 318.2 |
| Weight, Ounces | 11.22 |
| Balance, mm | 333 |
| Balance, Inch | 13.11 |
| Length, Cm | 68.6 |
| Length, Inch | 27.008 |
| Head Width | 9.581 |
| Head Length | 12.75 |
| Head Area, cm2 | 618.7 |
| Head Area, Sq. Inch | 95.94 |
| Beam Width, mm, Shaft, Center, Tip | 23.5, 22.7, 22.2 |
| In Plane Stiffness, Pounds/In | 454 Lbs/In. |
| In Plane Stiffness, Kg/cm | 178.7 Kg/cm |
| Number of Main Strings | 16 |
| Number of Cross Strings | 19 |
| Ratio Cross/Mains | .654 |
| Main String Grid | 7.312 |
| Cross String Grid | 9.562 |
| Density (% of head filled with string) | .644 |
| Average Cross String Space | .481 |
| Average Main String Space | .446 |
| Dynamic Tension, Kp, ERT | 38 |
| Dynamic Tensio | |