Category Archives: Weight
A Wilson RF 01 300 Extended
We want to share the specifications of an extended (70.0mm/27.559) Wilson RF 01 300.
The lengthening process involves removing the staples holding the butt on, which needs to be done carefully for the integrity of the foam pallet, before proceeding with the next steps.
Any time the butt cap comes off a racquet, the first step is to fill the open shaft with a stopper, preferably cotton, to the desired depth for fitting or protection. If the racquet is “foamed” some of it is removed.
Numerous small details go into the extension we design and print, so we will not go into all of those right now.
The area that will accept the extension is filled with a new two (2) part epoxy made by Starbond. This epoxy is nearly fully cured after several minutes; however, we prefer to let it cure overnight before proceeding with any other work.
After the curing cycle, the butt cap is installed. We do not use staples in most cases, only a chemical adhesive. Staples can easily damage the original foam pallet and the extension if the location is not ideal.
If you make it to the end of this data table, you will find some comparison data. This data is a glance at what has changed from the original 27-inch length. This is a specific racquet, so your specifications, if extended, may differ.
This is enough small talk, so let’s take a look at the results of the extension.
| Manufacturer | Wilson |
|---|---|
| Racquet Model | RF 01 300 Long |
| Reference Tension | 56 |
| String | Wilson Duramax NXT |
| Machine Used | Baiardo |
| String Bed Stiffness - RDC | 47 |
| String Bed Stiffness -FlexFour | 57 |
| Strig Bed Stiffness - SBS | 50.4 |
| String Bed Stiffness - ERT | 32 |
| Racquet Flex, RDC | 62 |
| Racquet Flex, FlexFour | 50.4 |
| Racquet - In Plane Stiffness | 450.6 |
| Weight, Grams | 355 |
| Weight, Ounces | 12.52 |
| Balance, mm | 314 |
| Balance, Inch | 12.36 |
| Length, Cm | 70 |
| Length, Inch | 27.559 |
| Head Width | 9.70 |
| Head Length | 12.80 |
| Head Area, cm2 | 629.1 |
| Head Area, Sq. Inch | 97.5 |
| Beam Height @ Grip, mm | 23 |
| Beam Height @ Mid, mm | 23 |
| Beam Height @ Tip, mm | 23 |
| Beam Width @ Grip, mm | 11.5 |
| Beam Width @ Throat, mm | 12 |
| Beam Width @ Mid, mm | 12 |
| Beam Width @ Tip, mm | 12 |
| Number of Main Strings | 16 |
| Number of Cross Strings | 19 |
| Ratio | .639 |
| Main String Grid Inch/mm | 7.42/188.5 |
| Cross String Grid Inch/mm | 10.56/268.2 |
| Density (% of head filled with string) | .804 |
| Average Cross String Space | .556 |
| Average Main String Space | .464 |
| Dynamic Tension, Kp, ERT | 32 |
| Dynamic Tension, Lbs/in | 178.9 |
| First Moment, Nm | .850 |
| Polar Moment | 356 |
| Torsional Stability | 17 |
| Swing Weight, Kg/cm^2 | 339 |
| Swing Weight, Ounces | 11.96 |
| Swing Weight Calculated | 350.0 |
| Power, RDC | 55 |
| Control, RDC | 41 |
| Manueverability, RDC | 61 |
| Power, Calculated | 2151.9 |
| Head Points | 11.34 |
| Head Weight, % | 44.9 |
| Center of Percussion | 21.5 |
| Dwell Time, ms | 6.83 |
| Efective Stiffness - lbs | 26.7 |
| K, Lb/In | 150.6 |
| Recoil Weight | 178.85 |
| Twist Weight | 250.25 |
| End Weight | 153.9 |
| Tip Weight | 200.4 |
| 9 O'Clock | 95.7 |
| 3 O'Clock | 94.4 |
| Butt End | 163.6 |
| COF, Main | .304 |
| COF, Cross | .386 |
| Property | Original | Extended | Change % |
|---|---|---|---|
| Overall Weight | 319 | 355 | 10.1 |
| Swing Weight | 310 | 339 | 8.5 |
| Length | 27.0 | 27.55 | 2.0 |
| Power Calculaton | 1892.8 | 2151.9 | 12.0 |
| Recoil Weight | 149.4 | 178.8 | 16.4 |
| Twist Weight | 224.87 | 250.2 | 10.1 |
Head Gravity MP L 2025
Wow! The new Head Gravity 2025 series keeps getting better! This is the new Head Gravity MP L and it hits the mark on many properties!
Head Gravity MP L 2025
The “MP” indicates it has a mid-plus head size of 100 square inches. The “L” means it is lighter than the “MP,” but everything else is the same head size and string pattern.
Why do we believe this is such a good racquet?
- Easy to customize as the player progresses
- Very good 16×20 string pattern spacing that creates a good, effective stiffness
- Terrific RDC flex of 59, making it perfect for precision and comfort
- The modified “cap” grommet system protects the string and racquet from “ball to foot” pick-up. This is important!
The table shows all of the properties, but it does not include the very important graphics!
If you are an aspiring junior or adult player, this is a racquet you must try.
| Manufacturer | Head |
|---|---|
| Racquet Model | Head Gravity MP L 2025 |
| Reference Tension | 55 |
| String | PEEK 7710 |
| Machine Used | True Tension Pro |
| String Bed Stiffness - RDC | 49 |
| String Bed Stiffness -FlexFour | 55.9 |
| Strig Bed Stiffness - SBS | 45.8 |
| String Bed Stiffness - ERT | 34 |
| Racquet Flex, RDC | 59 |
| Racquet Flex, FlexFour | 47 |
| Racquet - In Plane Stiffness | 446.8 |
| Weight, Grams | 307 |
| Weight, Ounces | 10.83 |
| Balance, mm | 343.0 |
| Balance, Inch | 13.50 |
| Length, Cm | 68.6 |
| Length, Inch | 27.008 |
| Head Width | 9.93 |
| Head Length | 12.86 |
| Head Area, cm2 | 646.5 |
| Head Area, Sq. Inch | 100.2 |
| Beam Height @ Grip, mm | 21.0 |
| Beam Height @ Mid, mm | 22.3 |
| Beam Height @ Tip | 22.8 |
| Beam Width @ Grip, mm | 10.5 |
| Beam Width @ Throat, mm | 10.6 |
| Beam Width @ Mid, mm | 10.8 |
| Beam Width @ Tip, mm | 12.2 |
| Number of Main Strings | 16 |
| Number of Cross Strings | 20 |
| Ratio | .616 |
| Main String Grid Inch/mm | 7.65/194.3 |
| Cross String Grid Inch/mm | 10.25/260.4 |
| Density (% of head filled with string) | .764 |
| Average Cross String Space | .516 |
| Average Main String Space | .464 |
| Dynamic Tension, Kp, ERT | 34 |
| Dynamic Tension, Lbs/in | 190.16 |
| First Moment, Nm | .822 |
| Polar Moment | 332 |
| Torsional Stability | 18 |
| Swing Weight, Kg/cm2 | 314 |
| Swing Weight, Ounces | 11.08 |
| Swing Weight Calculated | 361.2 |
| Power, RDC | 45 |
| Control, RDC | 55 |
| Manueverability, RDC | 77 |
| Power, Calculated | 1856.4 |
| Head Points | -.16 |
| Head Weight, % | 50.1% |
| Center of Percussion | 20.5 |
| Dwell Time, ms | 6.69 |
| Efective Stiffness - lbs | 26.8 |
| K, Lb/In | 157.1 |
| Recoil Weight | 135.1 |
| Twist Weight | 225.7 |
| End Weight | 109.6 |
| Tip Weight | 196.3 |
| 9 O'Clock | 95.0 |
| 3 O'Clock | 88.7 |
| Butt End | 122.2 |
| COF, Main | .380 |
| COF, Cross | .342 |
Three Important Things
When dealing with tennis racquets, there are many significant performance parameters. We are going to list our three (3) most important ones:
- Swing Weight
- Overall Weight
- Effective Stiffness
These particular parameters are based on machine testing, physics, and experience.
- Swing Weight: we refer to this as a dynamic weight, meaning how heavy or light the racquet feels during the swing to the ball.
- Overall Weight: This is normally considered to be the weight found on a scale, electronic, or balance. Weight is your friend if properly associated with your capabilities and stature.
- Effective Stiffness: is a calculable and measurable stiffness of the ball hitting the string as you are holding the racquet and hitting a ball.
Why is it Important?:
- Swing Weight: contributes to power and stability, which contributes to control. A higher swing weight of, say, 320 to 340 will handle most incoming balls with ease. Swing weights of 300 to 319 will be easier to maneuver and require a little more energy from the player to handle aggressive incoming balls.
- Overall Weight: contributes to ease of movement and long play time and must be associated with the stature and style of the player. The heavier racquet will provide more power with less energy expended by the player.
- Effective Stiffness: this is a metric we use to ensure the racquet is within the stiffness range needed by the player. For example, if you come into the World Headquarters of Racquet Quest for the first time with your current racquet and the strings are intact, we can determine the effective stiffness and, based on your satisfaction with the current playability, arrive at a corresponding effective stiffness…not on a reference tension. A range of 24 to 30 pounds is acceptable. Anything over 30 becomes quite stiff and should be avoided by most players.
If you look at our racquet reviews, you will see a lot more than three (3) performance parameters! We believe they are all important, but players should understand the three (3) described here.
Head Extreme Team 2024
The Head Extreme Team 2024 is the lightest of the Extreme 2024 Series and presents a 105 square head with a 16×19 string pattern…which means a very “open” string pattern! This “openness” can contribute to spin.
Head Extreme Team 2024
The “openness” can also contribute to lower string bed stiffness and may return a little more energy to your shots
This racquet makes a perfect platform for customization if your game changes but staying with a 105-head size is important.
Head Extreme Team 2024
| Manufacturer | Head |
|---|---|
| Racquet Model | Head Extreme Team 2024 |
| Reference Tension | 56 |
| String | Head Velocity |
| Machine Used | True Tension Pro |
| String Bed Stiffness - RDC | 37 |
| String Bed Stiffness -FlexFour | 50.5 |
| 43 | 50.6 |
| String Bed Stiffness - ERT | 29 Kg/Cm^ |
| Racquet Flex, RDC | 61 |
| Racquet Flex, FlexFour | 43 |
| Racquet - In Plane Stiffness | 448.7 Lbs/In |
| Weight, Grams | 278 |
| Weight, Ounces | 9.81 |
| Balance, mm | 347 |
| Balance, Inch | 12.56 |
| Length, Cm | 68.8 |
| Length, Inch | 27.08 |
| Head Width | 10.02 |
| Head Length | 13.27 |
| Head Area, cm2 | 673.9 |
| Head Area, Sq. Inch | 104.5 |
| Beam Height @ Grip, mm | 22.5 |
| Beam Height @ Mid, mm | 26.3 |
| Beam Height @ Tip | 23.3 |
| Beam Width @ Grip, mm | 17.5 |
| Beam Width @ Throat, mm | 14.8 |
| Beam Width @ Mid, mm | 13.2 |
| Beam Width @ Tip, mm | 14.5 |
| Number of Main Strings | 16 |
| Number of Cross Strings | 19 |
| Ratio | .636 |
| Main String Grid Inch/mm | 8.00 / 203.2 |
| Cross String Grid Inch/mm | 10.50 /266.7 |
| Density (% of head filled with string) | .812 |
| Average Cross String Space | .558 |
| Average Main String Space | .500 |
| Dynamic Tension, Kp, ERT | 29 |
| Dynamic Tension, Lbs/in | 162.2 |
| First Moment, Nm | .758 |
| Polar Moment | 314 |
| Torsional Stability | 16 |
| Swing Weight, Kg/cm2 | 298 |
| Swing Weight, Ounces | 10.51 |
| Swing Weight Calculated | 336.7 |
| Power, RDC | 51 |
| Control, RDC | 51 |
| Manueverability, RDC | 79 |
| Power, Calculated | 1979.9 |
| Head Points | -1.26 |
| Head Weight, % | 51.0% |
| Center of Percussion | 20.95 |
| Dwell Time, ms | 7.69 |
| Efective Stiffness - lbs | 23.03 |
| K, Lb/In | 162.2 |
| Recoil Weight | 129.2 |
| Twist Weight | 208.2 |
| End Weight | 99.8 |
| Tip Weight | 187.8 |
| 9 O'Clock | 87.9 |
| 3 O'Clock | 86.3 |
| Butt End | 115.5 |
| COF, Main | .392 |
| COF, Cross | .300 |
Racquet Quest, LLC
