Category Archives: Kinesiology

Yonex V-Core 100

Jul 7

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The Yonex V-Core is a great opportunity to review the racquet with IsoSpeed Professional 17 gauge string. If you know anything about the racquet you will know it is a great platform for many player types.

But what about IsoSpeed strings? These strings, and there are a series of them, are unusual in the material and construction, therefore not very well considered!

The string is polypropylene fibers bonded together then stretched and packaged on a stiff molded reel to retain some of the stretching.

If you have seen our previous review on our Questron data you will notice some similarity to natural gut.

Now let’s take a look at the data, shall we?
ManufacturerYonex
Racquet ModelYonex V-Core 100
Reference Tension55
String
IsoSpeed Professional 17
Machine UsedTrue Tension Pro
Static
String Bed Stiffness - RDC41
String Bed Stiffness -FlexFour53
String Bed Stiffness SBS48.6
String Bed Stiffness - ERT31 Kg/Cm^
Racquet Flex, RDC66
Racquet Flex, FlexFour48.6
Racquet - In Plane Stiffness423.7 lbs/In
Weight, Grams321
Weight, Ounces11.32
Balance, mm324
Balance, Inch12.76
Length, Cm68.8
Length, Inch27.08
Head Width9.87
Head Length12.82
Head Area, cm2641.3
Head Area, Sq. Inch99.4
Beam Height @ Grip, mm22
Beam Height @ Mid, mm25.6
Beam Height @ Tip25.5
Beam Width @ Grip, mm16.3
Beam Width @ Throat, mm15.2
Beam Width @ Mid, mm10.3
Beam Width @ Tip, mm11.6
Number of Main Strings16
Number of Cross Strings19
Ratio.649
Main String Grid Inch/mm7.50 / 190.5
Cross String Grid Inch/mm10.15 / 257.8
Density (% of head filled with string).747
Average Cross String Space.529
Average Main String Space.461
Dynamic
Dynamic Tension, Kp, ERT31
Dynamic Tension, Lbs/in173.4
First Moment, Nm.800
Polar Moment328
Torsional Stability15
Swing Weight, Kg/cm2313.0 Kg/Cm^
Swing Weight, Ounces11.094
Swing Weight Calculated337.0
Power, RDC58
Control, RDC41
Manueverability, RDC78
Power, Calculated 2073.9
Head Points5.98
Head Weight, %47.2%
Center of Percussion21.1
Dwell Time, ms7.31
Efective Stiffness - lbs25.3
K, Lb/In131.4
Recoil Weight154.2
Twist Weight233.8
End Weight 130.7
Tip Weight 188.4
9 O'Clock90.5
3 O'Clock89.4
Butt End140.2
COF, Main.392
COF, Cross.321

Posted in Inspiration, IsoSpeed, Juniors, Kinesiology, News!, Prestretch, String, String - New, String Bed Stiffness, Tension, True Tension

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Head Extreme Pro 2024 Custom Demo Setup

Jul 5

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We encourage all of our clients who are trying new racquets to have one of their “finalists” setup they way they will be using it.

This is a review of a Head Extreme Pro 2024 setup for the client.

ManufacturerHead
Racquet ModelHead Extreme Pro 2024
Reference Tension60
String
VS16 / ALU 115
Machine UsedTrue Tension Pro
Static
String Bed Stiffness - RDC55
String Bed Stiffness -FlexFour61.8
String Bed Stiffness - SBS50.6
String Bed Stiffness - ERT35 Kg/Cm
Racquet Flex, RDC64
Racquet Flex, FlexFour50.6
Racquet - In Plane Stiffness448.7
Weight, Grams334
Weight, Ounces11.78
Balance, mm319
Balance, Inch12.56
Length, Cm68.6
Length, Inch27.00
Head Width9.55
Head Length12.89
Head Area, cm2623.9
Head Area, Sq. Inch96.7
Beam Height @ Grip, mm20.5
Beam Height @ Mid, mm23
Beam Height @ Tip22
Beam Width @ Grip, mm14.5
Beam Width @ Throat, mm13
Beam Width @ Mid, mm11.5
Beam Width @ Tip, mm13.3
Number of Main Strings16
Number of Cross Strings19
Ratio.624
Main String Grid Inch/mm7.21/183.1
Cross String Grid Inch/mm9.63/244.6
Density (% of head filled with string).716
Average Cross String Space.507
Average Main String Space.451
Dynamic
Dynamic Tension, Kp, ERT35
Dynamic Tension, Lbs/in195.8
First Moment, Nm.816
Polar Moment336
Torsional Stability15
Swing Weight, Kg/cm2321
Swing Weight, Ounces11.32
Swing Weight Calculated339.9
Power, RDC50
Control, RDC50
Manueverability, RDC73
Power, Calculated 2006.7
Head Points7.56
Head Weight, %46.5%
Center of Percussion21.2
Dwell Time, ms6.31
Efective Stiffness - lbs29.6
K, Lb/In195.8
Recoil Weight163.1
Twist Weight228.7
End Weight 141.1
Tip Weight 191.8
9 O'Clock93.2
3 O'Clock90.6
Butt End150.3
COF, Main.372
COF, Cross.336

Posted in Auxetic, Demo, head, Inspiration, Juniors, Kinesiology, PEEK, Players Perspective, Polyester, Racquet Demo, Racquets, Racquets - New, String Bed Stiffness, String Patterns, Technology, Weight

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Is this Extreme or what!

Jul 4

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The new Head extreme series is here and it will not be ignored!  The citrus green color will make sure of that!

Head Extreme MP 2024

The Extreme series has been a very good one for us and our players and we believe this series will be even better!

Why?

This Extreme capitalizes on the big market for 100 square inch racquets but adds some performance advantages like a firm flex with proper flexibility in the shaft, a great grommet system with very deep and protective sections for the string.

This may be overlooked  but it should not be.

As you will see in the data this Extreme carries a lot of power to the court for you, and the string bed, with a dense center, can be adjusted to suit your game with out becoming too stiff.

The Extreme Series consists of:

The Extreme Pro 2024 98 square inch head and slightly heavier, slightly more flex, and a slightly lower swing weight.

The Extreme MP 2024 which is this review.

The Extreme Team 2024 which is a 105 square inch head indwell reviewed soon.

And my favorite the Extreme MPL 2024!    This is a 100 square inch head and a perfect weight to allow for customization to your specifications!  This will be reviewed soon!

ManufacturerHead
Racquet ModelHead Extreme MP 2024
Reference Tension58
String
PEEK 7710
Machine UsedTrue Tension Pro
Static
String Bed Stiffness - RDC50
String Bed Stiffness -FlexFour57.5
String Bed Stiffness - SBS51.8
String Bed Stiffness - ERT34 Kg/Cm^
Racquet Flex, RDC67
Racquet Flex, FlexFour37.8
Racquet - In Plane Stiffness475.6 lbs/In
Weight, Grams323
Weight, Ounces11.39
Balance, mm334
Balance, Inch13.15
Length, Cm68.6
Length, Inch27.00
Head Width9.69
Head Length13.05
Head Area, cm2640.9
Head Area, Sq. Inch99.3
Beam Height @ Grip, mm21
Beam Height @ Mid, mm26
Beam Height @ Tip23
Beam Width @ Grip, mm17
Beam Width @ Throat, mm14
Beam Width @ Mid, mm13
Beam Width @ Tip, mm15
Number of Main Strings16
Number of Cross Strings19
Ratio.626
Main String Grid Inch/mm7.25/184.1
Cross String Grid Inch/mm10.44/265.1
Density (% of head filled with string).762
Average Cross String Space.549
Average Main String Space.453
Dynamic
Dynamic Tension, Kp, ERT34
Dynamic Tension, Lbs/in190.2
First Moment, Nm.837
Polar Moment340.0
Torsional Stability16
Swing Weight, Kg/cm2324
Swing Weight, Ounces11.443
Swing Weight Calculated360.3
Power, RDC55
Control, RDC46
Manueverability, RDC71
Power, Calculated 2178.0
Head Points2.83
Head Weight, %48.7%
Center of Percussion20.8
Dwell Time, ms6.62ms
Efective Stiffness - lbs28.6
K, Lb/In160.25
Recoil Weight149.55
Twist Weight227.26
End Weight 124.1
Tip Weight 199.5
9 O'Clock93.9
3 O'Clock94.1
135.4144.0
COF, Main.348
COF, Cross.324

Posted in Auxetic, Demo, Inspiration, Juniors, Kinesiology, Patterns, PEEK, Power, Racquets - New, String Bed Stiffness, String Patterns, True Tension

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Head TK293.1 XL Retro Review

Apr 6

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Head TK293.1

This is the selection of “retro” racquets that will be included in our “Retro Review” series.

The following data is based on the XL version disguised as the “Auxetic” model. I imagine Auxetic was just a dream when these racquets were made.

While we are on Head Prestige racquets, I am surprised that more players avoid this series!

Especially now with the new Prestige MPL added to the mix.

We have a new shipment of the Head Prestige 16×19 in case you missed the first bunch!

ManufacturerHead
Racquet ModelHead TK293.1 XL
Reference Tension54
String
Machine UsedTrue Tension Pro
String Pattern16x19
Static
String Bed Stiffness - RDC52
String Bed Stiffness -FlexFour59.1
String Bed Stiffness - SBS46
String Bed Stiffness - ERT34
Racquet Flex, RDC64
Racquet Flex, FlexFour46
Racquet - In Plane Stiffness434.6
Effective Stiffness28.7
Weight, Grams335
Weight, Ounces11.82
Balance, mm328
Balance, Inch12.91
Length, Cm69.8
Length, Inch27.48
COP (inches from end)21.7
Head Width9.44
Head Length12.82
Head Area, cm2613.1
Head Area, Sq. Inch95.0
Beam Height @ Grip, mm22.5
Beam Height @ Mid, mm20.4
Beam Height @ Tip20.3
Beam Width @ Grip, mm10.6
Beam Width @ Throat, mm10.3
Beam Width @ Mid, mm11.4
Beam Width @ Tip, mm11.3
Number of Main Strings16
Number of Cross Strings19
Ratio.620
Main String Grid Inch/mm7.25/184.1
Cross String Grid Inch/mm9.06/230.1
Density (% of head filled with string).687
Average Cross String Space.477
Average Main String Space.451
Dynamic
Dynamic Tension, Kp, ERT34
Dynamic Tension, Lbs/in190.2
First Moment, Nm.848
Polar Moment358
Torsional Stability13
Swing Weight, Kg/cm2345
Swing Weight, Ounces12.17
Swing Weight Calculated360.4
Power, RDC54
Control, RDC47
Manueverability, RDC58
Power, Calculated 2182.2
Head Points6.61
Head Weight, %47.0%
Dwell Time, ms6.49 ms
K, Lb/In166.7
Recoil Weight173.29
Twist Weight224.33
End Weight 132.2
Tip Weight 202.3
9 O'Clock95.6
3 O'Clock94.8
Butt Cap145.2
COF, Main.484
COF, Cross.332

 

Posted in Auxetic, Custom Racquets, Customization!, Full Custom Racquets, Good News!, head, Inspiration, Juniors, Kinesiology, Patterns, PEEK, Prestige, Racquets - New, String Patterns

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