Category Archives: PEEK
Tecnifibre Fire 300
Tecnifibre Fire 300
The Tecnifibre Fire 300 is another great surprise from Tecnifibre.
Why a surprise? This racquet shows up as a very stiff racquet both “out of plane and in plane”, as you will see in the following numbers.
However, the string pattern and spacing present a “canvas” on which you can create the string bed stiffness of your dreams!
Given the stiffness properties of this racquet, we wanted to test the “limits,” so we used a reference tension of 54, one less than the suggested 55 maximum. Without going through all of the numbers, I can tell you that the Effective Stiffness is 26.7, which is well below our observed pain threshold of 30.0.
All of our demo racquets are strung with MonoGut ZX Pro (PEEK). What you do in terms of string may change that number, but you can be sure the racquet stiffness can be mitigated by your choice of string, tension, and racquet technician.
| Manufacturer | Tecnifibre |
|---|---|
| Racquet Model | Fire 300 |
| Reference Tension | 54 |
| String | MonoGut ZX Pro |
| Machine Used | True Tension Pro |
| String Bed Stiffness - RDC/Units | 45.9 |
| String Bed Stiffness -FlexFour/Pounds | 61.1 |
| String Bed Stiffness - SBS/Pounds | 46 |
| String Bed Stiffness - ERT/Kg/cm | 33 |
| Racquet Flex, RDC/Units | 73 |
| Racquet Flex, FlexFour/Lbs | 46 |
| Racquet - In Plane Stiffness/Lbs/Inch | 537.2 |
| Weight, Grams | 324 |
| Weight, Ounces | 11.3 |
| Balance, mm | 323 |
| Balance, Inch | 12.72 |
| Length, Cm | 68.7 |
| Length, Inch | 27.047 |
| Head Width | 9.98 |
| Head Length | 12.72 |
| Head Area, cm2 | 643.2 |
| Head Area, Sq. Inch | 99.7 |
| Beam Height @ Grip, mm | 25 |
| Beam Height @ Mid, mm | 25.3 |
| Beam Height @ Tip | 24.8 |
| Beam Width @ Grip, mm | 15.5 |
| Beam Width @ Throat, mm | 13.8 |
| Beam Width @ Mid, mm | 11.2 |
| Beam Width @ Tip, mm | 12.2 w/Bumper Guard |
| Number of Main Strings | 16 |
| Number of Cross Strings | 19 |
| Ratio | .661 |
| Main String Grid Inch/mm | 8.18/207.7 |
| Cross String Grid Inch/mm | 9.87/250.7 |
| Density (% of head filled w/ string) | .794 |
| Average Cross String Space | .513 |
| Average Main String Space | .508 |
| Dynamic Tension, Kp, ERT | 33 |
| Dynamic Tension, Lbs/in | 185.6 |
| First Moment, Nm | .804 |
| Polar Moment | 335 |
| Torsional Stability | 15 |
| Swing Weight, Kg/cm2 | 320 |
| Swing Weight, Ounces | 11.29 |
| Swing Weight Calculated | 338 |
| Power, RDC | 65 |
| Control, RDC | 32 |
| Manueverability, RDC | 73 |
| Power, Calculated | 2352.1 |
| Head Points | 6.46 |
| Head Weight, % | 47.0% |
| Center of Percussion | 21.4 |
| Dwell Time, ms | 7.22 |
| Efective Stiffness - lbs | 26.2 - Flex Four Data |
| K, Lb/In | 134.6 |
| Dynamic Stiffness/Lbs | 369.5 |
| Dynamic Force/Lbs | 141.8 |
| GDR Ratio: static/dynamic | 1.94 |
| Recoil Weight | 161.2 |
| Twist Weight | 240.6 |
| End Weight | 130.9 |
| Tip Weight | 190.3 |
| 9 O'Clock | 97.1 |
| 3 O'Clock | 96.2 |
| Butt End | 129.9 |
| COF, Main | .350 |
| COF, Cross | .262 |
Head Extreme Pro 2026
If you are thinking of a new 98 square inch high-performance racquet, don’t make a decision until you try this one!
This one is the new Head Extreme Pro for 2026, with a beautiful cosmetic upgrade and material enhancements that improve performance.
Something that you may not notice but is very good is the elongated cross-string holes in the twelve (12) central cross strings’ location. This design increases the effective hitting area by a couple of inches without increasing the head width. This is not unique to the Extreme Series, but it does not show up in the Speed or Gravity series.
Head Extreme Pro 2026
| Manufacturer | Head |
|---|---|
| Racquet Model | Head Extreme Pro 2026 |
| Reference Tension | 55 |
| String | MonoGut ZX Pro |
| Machine Used | True Tension Pro |
| String Bed Stiffness - RDC/Units | 50 |
| String Bed Stiffness -FlexFour/Pounds | 63 |
| Strig Bed Stiffness - SBS/Pounds | 43.5 |
| String Bed Stiffness - ERT/Kg/cm | 34 |
| Racquet Flex, RDC/Units | 67 |
| Racquet Flex, FlexFour/Lbs | 43.5 |
| Racquet - In Plane Stiffness/Lbs/Inch | 493.6 |
| Weight, Grams | 330 |
| Weight, Ounces | 11.64 |
| Balance, mm | 323 |
| Balance, Inch | 12.72 |
| Length, Cm | 68.6 |
| Length, Inch | 27.008 |
| Head Width | 9.56 |
| Head Length | 12.87 |
| Head Area, cm2 | 623.8 |
| Head Area, Sq. Inch | 96.7 |
| Beam Height @ Grip, mm | 20.5 |
| Beam Height @ Mid, mm | 23.3 |
| Beam Height @ Tip | 22.4 |
| Beam Width @ Grip, mm | 15.7 |
| Beam Width @ Throat, mm | 134.0 |
| Beam Width @ Mid, mm | 11.5 |
| Beam Width @ Tip, mm | 13.9 w/Bumper Guard |
| Number of Main Strings | 16 |
| Number of Cross Strings | 19 |
| Ratio | .625 |
| Main String Grid Inch/mm | 7.21/183.1 |
| Cross String Grid Inch/mm | 9.63/244.6 |
| Density (% of head filled w/ string) | .728 |
| Average Cross String Space | .507 |
| Average Main String Space | .457 |
| Dynamic Tension, Kp, ERT | 34 |
| Dynamic Tension, Lbs/in | 190.2 |
| First Moment, Nm | .819 |
| Polar Moment | 331.0 |
| Torsional Stability | 14 |
| Swing Weight, Kg/cm2 | 317 |
| Swing Weight, Ounces | 11.18 |
| Swing Weight Calculated | 344.3 |
| Power, RDC | 55 |
| Control, RDC | 48 |
| Manueverability, RDC | 75 |
| Power, Calculated | 2074.2 |
| Head Points | 6.30 |
| Head Weight, % | 47.1% |
| Center of Percussion | 20.9 |
| Dwell Time, ms | 6.62 |
| Efective Stiffness - lbs | 26.4 - Flex Four Data |
| K, Lb/In | 160.26 |
| Dynamic Stiffness/Lbs | 369.5 |
| Dynamic Force/Lbs | 141.8 |
| GDR Ratio: static/dynamic | 1.94 |
| Recoil Weight | 155.24 |
| Twist Weight | 226.4 |
| End Weight | 134.9 |
| Tip Weight | 193.9 |
| 9 O'Clock | 97.5 |
| 3 O'Clock | 95.8 |
| Butt End | 136.9 |
| COF, Main | .348 |
| COF, Cross | .352 |
A Golden (actually gloss black) Opportunity!
We have four (4) Head Auxetic Radical MP SMUs (351.1), but this is the only one in gloss black! All of them can be gloss black, but this is the only one that is currently available.
The racquet is totally “raw,” no weight, no grip, no swing weight, and no length, yet!
Head 351.1
This racquet will be set up to your specifications.
Your racquet will come with a complete specification document.
You can choose either a leather or a synthetic base grip.
Your racquet will be strung with Ashaway MonoGut ZX Pro (17-gauge), either black or natural, to introduce you to the benefits of PEEK.
The cost of this opportunity is $525.00, including tax and shipping in the United States.
Please contact us if you have any questions about this or any of our other SMU racquets.
The Consumer and SBS
Sting Bed Stiffness (SBS) could be considered alongside performance cars. In the simplest of terms, a high-performance car requires some understanding of what it is going to do; otherwise, you will end up in the trees or worse!
The same with String Bed Stiffness (SBS). If you don’t know what it is going to do, you may end up in the fence!
Racquet Quest, LLC
