Category Archives: Power
Head Auxetic 2 Radical Pro 2025
The Radical Pro represents the pinnacle of a player’s racquet. So, this review is based on our desire to see how much power we can squeeze out of it through string bed stiffness.
The following specifications explain why this racquet’s natural properties make it a powerhouse.
This 98-square-inch racquet packs a powerful 339-gram weight with a very easy-to-handle 331 swing weight!
With this racquet, you will not be pushed around by big hitters.
As tested, this racquet has a stiffness rating of 66, which is moderately high. However, with an effective stiffness of 27.1, it is well within the range of any player who can benefit from the other performance factors.
As you can tell from the picture, the racquet is ORANGE. These pictures are the skills of Bobby Diviliansky, a high school student who just happened to stop at the World Headquarters! His brother Ryan is a client, so he had a reason to be here.
| Manufacturer | Head |
|---|---|
| Racquet Model | Head PT57A2 Auxetic Coat - No Grip Pallet |
| Reference Tension | |
| String | |
| Machine Used | |
| String Bed Stiffness - RDC | |
| String Bed Stiffness -FlexFour | |
| Strig Bed Stiffness - SBS | |
| String Bed Stiffness - ERT | |
| Racquet Flex, RDC,No Pallet | 62 |
| Racquet Flex, FlexFour, No Pallet | 57 |
| Racquet - In Plane Stiffness | 462.2 |
| Weight, Grams | 255.6 |
| Weight, Ounces | 9.016 |
| Balance, mm | 354 |
| Balance, Inch | 13.94 |
| Length, Cm | 68.2 |
| Length, Inch | 26.850 |
| Head Width | 9.437 |
| Head Length | 12.748 |
| Head Area, cm^2 | 611.3 |
| Head Area, Sq. Inch | 94.75 |
| Beam Height @ Grip, mm | 21.1 |
| Beam Height @ Mid, mm | 20.3 |
| Beam Height @ Tip | 20.3 |
| Beam Width @ Grip, mm | 11.0 |
| Beam Width @ Throat, mm | 11.0 |
| Beam Width @ Mid, mm | 11.7 |
| Beam Width @ Tip, mm | 11.5 |
| Number of Main Strings | 18 |
| Number of Cross Strings | 20 |
| Ratio | .634 |
| Main String Grid Inch/mm | 7.18/182.3 |
| Cross String Grid Inch/mm | 9.51/241.5 |
| Density (% of head filled with string) | |
| Average Cross String Space | |
| Average Main String Space | |
| Dynamic Tension, Kp, ERT | |
| Dynamic Tension, Lbs/in | |
| First Moment, Nm | |
| Polar Moment | |
| Torsional Stability | |
| Swing Weight, Kg/cm^2 | 285 |
| Swing Weight, Ounces | |
| Swing Weight Calculated | 318.5 |
| Power, RDC | |
| Control, RDC | |
| Manueverability, RDC | |
| Power, Calculated | |
| Head Points | |
| Head Weight, % | |
| Center of Percussion | |
| Dwell Time, ms | |
| Efective Stiffness - lbs | |
| K, Lb/In | |
| Recoil Weight | |
| Twist Weight | |
| End Weight | 81.2 |
| Tip Weight | 177.6 |
| 9 O'Clock | 87.2 |
| 3 O'Clock | 87.9 |
| Butt End | 88.1 |
| COF, Main | |
| COF, Cross | |
Power from Head Radical Pro
As with many of the Head “Pro” series racquets, they have been considered control racquets, not necessarily powerful.
Head Auxetic 2 Radical Pro
We set out to see what kind of “power” number we could get using string bed stiffness only. Obviously, more swing weight and maybe more overall weight would do it, but the Head Radical Pro is already at the top of these specifications.
The following video is a look at our software data.
A Long Head Gravity Tour 98
As a high performance racquet technologies business, we have requests for everything imaginable, some not so imaginable! Long racquets are at the top of the list.
Full Custom Head Gravity Tour 98!
Here is a review of a Head Gravity Tour 98 2025 SMU that is 27.75 inches long/70.485cm. See if you can determine which property is most affected by the length.
You can see the string properties here as data taken on our Questron.
| Manufacturer | Head |
|---|---|
| Racquet Model | Head Gravity Tour 98 2025 SMU |
| Reference Tension | 57 |
| String | MonoGut ZX Pro |
| Machine Used | True Tension Pro |
| String Bed Stiffness - RDC | 52 |
| String Bed Stiffness -FlexFour | 61.0 |
| Strig Bed Stiffness - SBS | 50.6 |
| String Bed Stiffness - ERT | 37 |
| Racquet Flex, RDC | 58 |
| Racquet Flex, FlexFour | 43 |
| Racquet - In Plane Stiffness | 429.5 |
| Weight, Grams | 335 |
| Weight, Ounces | 11.82 |
| Balance, mm | 331 |
| Balance, Inch | 13.03 |
| Length, Cm | 70.5 |
| Length, Inch | 27.756 |
| Head Width | 9.86 |
| Head Length | 12.71 |
| Head Area, cm2 | 633.6 |
| Head Area, Sq. Inch | 98.2 |
| Beam Height @ Grip, mm | 21.3 |
| Beam Height @ Mid, mm | 21 |
| Beam Height @ Tip | 21.5 |
| 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 | 19 |
| Ratio | .650 |
| Main String Grid Inch/mm | 7.72/196.1 |
| Cross String Grid Inch/mm | 10.25/260.4 |
| Density (% of head filled with string) | .785 |
| Average Cross String Space | .546 |
| Average Main String Space | .464 |
| Dynamic Tension, Kp, ERT | 37 |
| Dynamic Tension, Lbs/in | 206.94 |
| First Moment, Nm | .858 |
| Polar Moment | 362 |
| Torsional Stability | 18 |
| Swing Weight, Kg/cm2 | 344 |
| Swing Weight, Ounces | 12.13 |
| Swing Weight Calculated | 367.0 |
| Power, RDC | 49 |
| Control, RDC | 52 |
| Manueverability, RDC | 57 |
| Power, Calculated | 2096.5 |
| Head Points | 6.77 |
| Head Weight, % | 47% |
| Center of Percussion | 21.44 |
| Dwell Time, ms | 6.492 |
| Efective Stiffness - lbs | 27.42 |
| K, Lb/In | 166.67 |
| Recoil Weight | 167.7 |
| Twist Weight | 242.8 |
| End Weight | 131.6 |
| Tip Weight | 202./6 |
| 9 O'Clock | 94.7 |
| 3 O'Clock | 94.9 |
| Butt End | 144.5 |
| COF, Main | .339 |
| COF, Cross | .300 |
Racquet Quest, LLC
