Category Archives: Racquet Demo

Tecnifibre Fire 300

Aug 6

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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.

ManufacturerTecnifibre
Racquet ModelFire 300
Reference Tension54
String
MonoGut ZX Pro
Machine UsedTrue Tension Pro
Static
String Bed Stiffness - RDC/Units45.9
String Bed Stiffness -FlexFour/Pounds61.1
String Bed Stiffness - SBS/Pounds46
String Bed Stiffness - ERT/Kg/cm33
Racquet Flex, RDC/Units73
Racquet Flex, FlexFour/Lbs46
Racquet - In Plane Stiffness/Lbs/Inch537.2
Weight, Grams324
Weight, Ounces11.3
Balance, mm323
Balance, Inch12.72
Length, Cm68.7
Length, Inch27.047
Head Width9.98
Head Length12.72
Head Area, cm2643.2
Head Area, Sq. Inch99.7
Beam Height @ Grip, mm25
Beam Height @ Mid, mm25.3
Beam Height @ Tip24.8
Beam Width @ Grip, mm15.5
Beam Width @ Throat, mm13.8
Beam Width @ Mid, mm11.2
Beam Width @ Tip, mm12.2 w/Bumper Guard
Number of Main Strings16
Number of Cross Strings19
Ratio.661
Main String Grid Inch/mm8.18/207.7
Cross String Grid Inch/mm9.87/250.7
Density (% of head filled w/ string).794
Average Cross String Space.513
Average Main String Space.508
Dynamic
Dynamic Tension, Kp, ERT33
Dynamic Tension, Lbs/in185.6
First Moment, Nm.804
Polar Moment335
Torsional Stability15
Swing Weight, Kg/cm2320
Swing Weight, Ounces11.29
Swing Weight Calculated338
Power, RDC65
Control, RDC32
Manueverability, RDC73
Power, Calculated 2352.1
Head Points6.46
Head Weight, %47.0%
Center of Percussion21.4
Dwell Time, ms7.22
Efective Stiffness - lbs26.2 - Flex Four Data
K, Lb/In134.6
Dynamic Stiffness/Lbs369.5
Dynamic Force/Lbs141.8
GDR Ratio: static/dynamic1.94
Recoil Weight161.2
Twist Weight240.6
End Weight 130.9
Tip Weight 190.3
9 O'Clock97.1
3 O'Clock96.2
Butt End129.9
COF, Main.350
COF, Cross.262

Posted in Demo, Patterns, PEEK, Power, Racquet Demo, Racquets - New, String Patterns, Tecnifibre, Tension, True Tension

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Wilson Defyer Pro 98 v1.0

Jul 25

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Wilson Defyer Pro 98 v1

The Wilson Defyer product release is one of the most unusual and talked-about releases in a long time!

The initial prototypes were “Python”; the next iteration was “Redline”; and the newly released, and final, version is the “Defyer”.

The Defyer is available in 98 and 100 square inch head sizes.  The string pattern is 16×20 with spacing that allows for a broad range of string bed stiffnesses to suit most play styles.

The head shape and geometry are familiar; however, there is some “sculpting” going on that adds something to the overall appearance.

While appearance is important, the real stuff is in the numbers, and we have those right here…

After you go through the numbers, stick around for some additional highlights that may go unnoticed.

ManufacturerWilson
Racquet ModelDefyer Pro 98 v1
Reference Tension56
String
MonoGut ZX Pro
Machine UsedTrue Tension Pro
Static
String Bed Stiffness - RDC47
String Bed Stiffness -FlexFour61
Strig Bed Stiffness - SBS51.7
String Bed Stiffness - ERT33
Racquet Flex, RDC65
Racquet Flex, FlexFour51.5
Racquet - In Plane Stiffness474.4
Weight, Grams325
Weight, Ounces11.46
Balance, mm327
Balance, Inch12.87
Length, Cm68.7
Length, Inch27.047
Head Width9.80
Head Length12.76
Head Area, cm2633.7
Head Area, Sq. Inch98.2
Beam Height @ Grip, mm22.5
Beam Height @ Mid, mm23.8
Beam Height @ Tip22.5
Beam Width @ Grip, mm18
Beam Width @ Throat, mm13.8
Beam Width @ Mid, mm11
Beam Width @ Tip, mm13.6 (w/Bumper Guard)
Number of Main Strings16
Number of Cross Strings20
Ratio.614
Main String Grid Inch/mm7.56/192.2
Cross String Grid Inch/mm10.41/264.4
Density (% of head filled with string).768
Average Cross String Space.520
Average Main String Space.453
Dynamic
Dynamic Tension, Kp, ERT33
Dynamic Tension, Lbs/in184.57
First Moment, Nm.819
Polar Moment333.0
Torsional Stability16
Swing Weight, Kg/cm2317
Swing Weight, Ounces11.18
Swing Weight Calculated347.5
Power, RDC54
Control, RDC44
Manueverability, RDC74
Power, Calculated 2044.1
Head Points5.20
Head Weight, %47.6%
Center of Percussion20.9
Dwell Time, ms6.83
Efective Stiffness - lbs27.3
K, Lb/In150.64
Recoil Weight151.88
Twist Weight233.42
End Weight 134.4
Tip Weight 194.4
9 O'Clock97.4
3 O'Clock94.8
Butt End137.4
COF, Main.382
COF, Cross.315

Something with tennis racquets that is important to us is “serviceability”.  The Defyer, like most Wilson racquets, has a nice grommet system that protects the string from “court contact” damage, and is “aerodynamic” in shape.

The grip pallet system is another matter, however, and makes grip size and shape modifications difficult, if not impossible.  So, when you are making a purchasing decision, be sure you are choosing the correct grip size.  This pallet system is not unique to the Defyer, but the Defyer is in the category of  “customizable” racquets.  Don’t plan on much grip customization!

Posted in Customization!, Demo, Grips, Grommets, Racquet Demo, Technology, True Tension, Wilson

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Head Extreme Pro 2026

Jul 2

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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

ManufacturerHead
Racquet ModelHead Extreme Pro 2026
Reference Tension55
String
MonoGut ZX Pro
Machine UsedTrue Tension Pro
Static
String Bed Stiffness - RDC/Units50
String Bed Stiffness -FlexFour/Pounds63
Strig Bed Stiffness - SBS/Pounds43.5
String Bed Stiffness - ERT/Kg/cm34
Racquet Flex, RDC/Units67
Racquet Flex, FlexFour/Lbs43.5
Racquet - In Plane Stiffness/Lbs/Inch493.6
Weight, Grams330
Weight, Ounces11.64
Balance, mm323
Balance, Inch12.72
Length, Cm68.6
Length, Inch27.008
Head Width9.56
Head Length12.87
Head Area, cm2623.8
Head Area, Sq. Inch96.7
Beam Height @ Grip, mm20.5
Beam Height @ Mid, mm23.3
Beam Height @ Tip22.4
Beam Width @ Grip, mm15.7
Beam Width @ Throat, mm134.0
Beam Width @ Mid, mm11.5
Beam Width @ Tip, mm13.9 w/Bumper Guard
Number of Main Strings16
Number of Cross Strings19
Ratio.625
Main String Grid Inch/mm7.21/183.1
Cross String Grid Inch/mm9.63/244.6
Density (% of head filled w/ string).728
Average Cross String Space.507
Average Main String Space.457
Dynamic
Dynamic Tension, Kp, ERT34
Dynamic Tension, Lbs/in190.2
First Moment, Nm.819
Polar Moment331.0
Torsional Stability14
Swing Weight, Kg/cm2317
Swing Weight, Ounces11.18
Swing Weight Calculated344.3
Power, RDC55
Control, RDC48
Manueverability, RDC75
Power, Calculated 2074.2
Head Points6.30
Head Weight, %47.1%
Center of Percussion20.9
Dwell Time, ms6.62
Efective Stiffness - lbs26.4 - Flex Four Data
K, Lb/In160.26
Dynamic Stiffness/Lbs369.5
Dynamic Force/Lbs141.8
GDR Ratio: static/dynamic1.94
Recoil Weight155.24
Twist Weight226.4
End Weight 134.9
Tip Weight 193.9
9 O'Clock97.5
3 O'Clock95.8
Butt End136.9
COF, Main.348
COF, Cross.352

Posted in Auxetic, Demo, Dwell Time, head, Patterns, PEEK, Racquet Demo, Racquets, Racquets - New, String Bed Stiffness, String Patterns, True Tension

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Right here…Right now! Squared

Apr 3

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The brand new Head Squared racquets are here, but we don’t expect them to be here long!  This is a much-anticipated arrival, and we are excited to show and talk about this racquet.

Head Squared…Here!

In a “nutshell,” this racquet departs from some norms.  That is the Dual Tube foam-filled addition to the shaft, enhancing comfort and calmness.
A 16 x 18 string pattern that offers easy access to deep ball contact.
The overall weight is ideal for aggressive, stable play, and the swing weight makes it easy to handle… and fun!
You can see all the technical stuff in the previous post, but the real way to see the racquet is to be here.
Before it is too late!

Posted in Demo, Gift Card, Good News!, head, Patterns, Power, Racquet Demo, Racquets - New, Squared, String Patterns, Technology

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