Category Archives: String Patterns

Head Graphene 360 + Gravity MP

The new Head Gravity MP seemed like the perfect place to start with this new series of racquets so that is what we did!

We believe this racquet falls between the Prestige and Radical series and will appeal to more players than either of those.  Plus, there are two (2) 104 square inch models, the Lite, and S.  These are relativley “thin” beam, (Lite and S = 24.4mm) racquets that Head has been missing, in my opinion, for a while.

It has a “flip” color scheme…one side is lava and the other is Miami Green (my word).

IMG_0396

Head Graphene 360 + Gravity MP Lava Side

The head shape is a little more round.  The weight is 312 grams (11.01 oz) which I think is a little light.  The swing weight is 324 kg/cm² ( a good starting point).

The unique fiber layup is designed to “uncoil” at impact contributing to a new kind of power, and hopefully comfort.

The unique fiber layup is designed to “uncoil” at impact contributing to a new kind of power, and hopefully comfort.

The Series consists of a “Pro”, “MP”. “MP Lite”, “S”,  and”Lite”.  There is a Model Comparison post where you can see all of the racquets in one place.

ManufacturerHead
Racquet ModelHead Graphene 360 + Gravity MP
Reference Tension55 lbs - 24.9 kg
String
MonoGut ZX Pro
Machine UsedTrue Tension Professional
Static
ASPS, RDC52
ASPS, FlexFour60.5
Racquet Flex, RDC59 - After stringing
Racquet Flex, FlexFour43
Racquet - In Plane Stiffness380.1 lbs/Inch
Weight, Grams312
Weight, Ounces11.01


Balance, mm342
Balance, Inch13.46
Length, Cm68.6
Length, Inch27.008
Head Width9.92
Head Length12.85
Head Area, cm2645.9
Head Area, Sq. Inch100.1
Number of Main Strings16
Number of Cross Strings20
Ratio Cross/Mains.617
Main String Grid7.62
Cross String Grid10.30
Density (% of head filled with string).798
Average Cross String Space.515
Average Main String Space.476
Dynamic
Dynamic Tension, Kp, ERT35
Dynamic Tension, Lbs/in195.7
First Moment, Nm.833
Polar Moment340
Torsional Stability16
Swing Weight, Kg/cm2324
Swing Weight, Ounces11.43
Swing Weight Calculated364.9
Power, RDC46
Control, RDC56
Manueverability, RDC71
Power, Calculated 1932.8
Head Points.31
Head Weight, %49.9%
Center of Percussion20.8
Dwell Time, ms8.82
Efective Stiffness - lbs27.6
K, Lb/In166,7
Recoil Weight143.69
Twist Weight229.04
End Weight 114.6
Tip Weight 200.3
9 O'Clock99.2
3 O'Clock99.4
Butt Cap114.9

String Bed Stiffness – A Short Video

It is raining today and it felt like a good time to talk about “string bed stiffness”…so let’s go!

This quick video will make a plea to you tennis players to demand more from your racquet technician so you are getting the most from your equipment.

Thank you for watching!

Head Graphene 360 Radical PWR

Head Graphene 360 Radical Series

As you would expect “PWR” means power! With a calculated power factor of 2294.7 that is true! You can see by the picture above that the PWR has a slightly larger head size (109.9 square inch) and a reasonable beam of 26/25/23 which contributes to a racquet stiffness of 65.

Head Graphene 360 Radical PWR

Head PWR 14 x 19 String Pattern

Unique to the PWR series of Head racquets this racquet can be either a 16 x 19 or 14 x 19 string pattern by replacing the top grommets with the included grommet set.

This format creates a “fan pattern” that makes the upper portion of the string bed very “open”.

 

 

 

 

 

 

 

 

This is a picture of last yesrs model. Whichever pattern you choose you will be presented with plenty of power…PWR!

 

 

 

 

ManufacturerHead
Racquet ModelGraphene 360 Radical PWR
Reference Tension60 lbs - 30.6 kg
String
Head Velocity MLT 17 Pink
Machine UsedTrue Tension Professional
Static
ASPS, RDC52
ASPS, FlexFour59
Racquet Flex, RDC65 - After stringing
Racquet Flex, FlexFour42
Racquet - In Plane Stiffness310.9 lbs/Inch
Weight, Grams284
Weight, Ounces10.02
Balance, mm350
Balance, Inch13.78
Length, Cm69.5
Length, Inch27.362
Head Width9.99
Head Length14.00
Head Area, cm2708.8
Head Area, Sq. Inch109.9
Number of Main Strings16
Number of Cross Strings19
Ratio Cross/Mains.601
Main String Grid8.20
Cross String Grid10.90
Density (% of head filled with string).814
Average Cross String Space.574
Average Main String Space.513
Dynamic
Dynamic Tension, Kp, ERT34
Dynamic Tension, Lbs/in190.16
First Moment, Nm.780
Polar Moment328
Torsional Stability16
Swing Weight, Kg/cm2312
Swing Weight, Ounces11.01
Swing Weight Calculated347.9
Power, RDC51
Control, RDC51
Manueverability, RDC79
Power, Calculated 2294.7
Head Points-0.79 (negative is head heavy)

Head Weight, %50.4%
Center of Percussion21.2
Dwell Time, ms8.82 Ms - No Swing
Efective Stiffness - lbs28.9
K, Lb/In166.67
Recoil Weight136.76
Twist Weight211.39
End Weight 96.7
Tip Weight 187.8
9 O'Clock93.6
3 O'Clock98.1
Butt Cap92.5

Head Graphene 360 Radical S

Head Graphene 360 Radical Series

As you can see by the picture above the Graphene 360 Radical S looks a lot like the others in this series, however, the “S” stands for “special”. Why? Because the “S” combines the most popular specifications from full blown players racquets and brings them to the masses! In fact, according to Head, this is the best selling Radical!

Head Graphene 360 Radical S

The 102 square inch head and stiffness of 59 are fitted into a thinner beam (22/25/23) to create a very user friendly combination.

Take a look at the specs below.

 

 

 

 

 

 

ManufacturerHead
Racquet ModelGraphene 360 Radical S
Reference Tension58 lbs - 26.3 kg
String
Head Velocity MLT 17 Yellow
Machine UsedTrue Tension Professional
Static
ASPS, RDC55
ASPS, FlexFour61
Racquet Flex, RDC59 - After stringing
Racquet Flex, FlexFour40
Racquet - In Plane Stiffness361.4 lbs/Inch
Weight, Grams302
Weight, Ounces10.65
Balance, mm329
Balance, Inch12.95
Length, Cm68.5
Length, Inch26.968
Head Width9.79
Head Length13.28
Head Area, cm2658.6
Head Area, Sq. Inch102.1
Number of Main Strings16
Number of Cross Strings19
Ratio Cross/Mains.621
Main String Grid7.50
Cross String Grid10.00
Density (% of head filled with string).735
Average Cross String Space.526
Average Main String Space.469
Dynamic
Dynamic Tension, Kp, ERT35
Dynamic Tension, Lbs/in195.76
First Moment, Nm.767
Polar Moment319
Torsional Stability15
Swing Weight, Kg/cm2304
Swing Weight, Ounces10.72
Swing Weight Calculated326.9
Power, RDC41
Control, RDC61
Manueverability, RDC84
Power, Calculated 1831.1
Head Points4.09
Head Weight, %48.1%
Center of Percussion21.2
Dwell Time, ms8.58 Ms - No Swing
Efective Stiffness - lbs28.5
K, Lb/In176.28
Recoil Weight147.83
Twist Weight216.37
End Weight 119.9
Tip Weight 182.2
9 O'Clock94.0
3 O'Clock91.8
Butt Cap115.8

Head Graphene 360 Radical Pro

Head Graphene 360 Radical Series

Don’t let the word “Pro” scare you away from trying this racquet! You can see all the specs below but this 98 square inch head and thin beam (20/23/21) add up to a definitive “players” racquet just slightly heavier than the MP but having the same swing weight.

The Graphene material has been re-arranged a little and is now “360” as oppossed to “Touch”. It seems the word “touch” diminished the famous feed-back of the racquet…so goodbye!

Like the “MP” the “Pro” has a slightly more “round” grip shape on a pallet that accepts the Head Sensor, as do all the recent Head racquets.

Head Graphene 360 Radical Pro

ManufacturerHead
Racquet ModelGraphene 360 Radical Pro
Reference Tension56 lbs - 25 k.4g
String
Head Velocity MLT 16 Black
Machine UsedTrue Tension Professional
Static
ASPS, RDC55
ASPS, FlexFour64.5
Racquet Flex, RDC66 - After stringing
Racquet Flex, FlexFour46
Racquet - In Plane Stiffness526.3 lbs/Inch
Weight, Grams333
Weight, Ounces11.74
Balance, mm322
Balance, Inch12.68
Length, Cm68.6
Length, Inch27.008
Head Width9.51
Head Length12.94
Head Area, cm2623.7
Head Area, Sq. Inch96.7
Number of Main Strings16
Number of Cross Strings19
Ratio Cross/Mains.619
Main String Grid7.50
Cross String Grid9.40
Density (% of head filled with string).729
Average Cross String Space.495
Average Main String Space.469
Dynamic
Dynamic Tension, Kp, ERT36
Dynamic Tension, Lbs/in201.35
First Moment, Nm.826
Polar Moment333
Torsional Stability14
Swing Weight, Kg/cm2319
Swing Weight, Ounces11.25
Swing Weight Calculated346.3
Power, RDC50
Control, RDC50
Manueverability, RDC74
Power, Calculated 2055.6
Head Points6.61
Head Weight, %46.9%
Center of Percussion20.9
Dwell Time, ms8.58 - No Swing
Efective Stiffness - lbs30.0
K, Lb/In176.28
Recoil Weight156.7
Twist Weight226.9
End Weight 137.1
Tip Weight 196.9
9 O'Clock100.5
3 O'Clock100.9
Butt Cap131.3
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