Category Archives: PEEK
Pro Stock Limited Reserve
This is a high-performance string that has gone unnoticed for a while and I don’t know why!
Pro Stock Limited Reserve is a string we purchased because it has interesting characteristics that appealed to us however the client base is small. Recently, however, with the number of players that are moving away from a polyester string, this has become a popular alternative!
Pro Stock Limited Reserve
In a word, this plot looks very much like that of natural gut, and whatever you think natural gut is still considered the best performance material for racquet string!
What are we seeing here:
- Linearity, the more linear the string the more consistent (predictable)
- Elongation, at 33.1 mm at 50 pounds
- Elasticity, 71.9 %
- This is the area where the advantages of pre-stretching will be seen.
- The curve will become essentially one line meaning the string returns to a nominal length after stretching.
- Ultimate Tensile Strength, 163.6 pounds to fail (high), @107.2 mm deflection
- Knot strength, @102.4 pounds, and surpasses natural gut in this property.
What we can’t see in the plot is the construction of this multifilament string. Each strand is a thin, flat ribbon of polyolefin material. The ribbons are much like the natural gut.
The plot below is a comparison of natural gut string and is included as a visual to compare to Pro Stock Limited Reserve and show how much natural gut fibers are the same for any string manufacturer. Of course, manufacturing techniques, bonding agents, and coatings make the difference between a good gut and a not-so-good gut!
If you compare the Pro Stock Limited Reserve to natural gut you can quickly see why it may be a good string to try!
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 |
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 |
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