Category Archives: Juniors

Head Graphene 360 + Gravity S

Here is where it gets interesting!  This racquet, the Gravity S, is a realtivley thin beam 104 square inch racquet!

It has been a while since Head has presented this head size in a player oriented racquet!  This 296 gram (10.44 ounce) racquet fills a serious need, in my opinion, for a “players” 104!  The 24mm beam allows the stiffness to reflect the new “Spiral Tech” fiber placement.

Model Comparison

I believe this racquet will appeal to serious adults seeking a comfortable racquet  (RDC 56 strung) that can elevate their game.

This racquet has plenty of “cutomization” potential which makes it great choice for quickly advancing players.

Stop by and feel this combination for yourself, and take the demo for a real test on the court!

 

 

ManufacturerHead
Racquet ModelHead Graphene 360 + Gravity S
Reference Tension55 lbs - 24.9 kg
String
Head Velocity MLT Black
Machine UsedTrue Tension Professional
Static
ASPS, RDC56
ASPS, FlexFour64.0
Racquet Flex, RDC55 - After stringing
Racquet Flex, FlexFour45
Racquet - In Plane Stiffness304.6 lbs/Inch
Weight, Grams296.0
Weight, Ounces10.44

Balance, mm329
Balance, Inch12.95
Length, Cm68.6
Length, Inch27.008
Head Width10.15
Head Length13.19
Head Area, cm2678.4
Head Area, Sq. Inch105.2
Number of Main Strings16
Number of Cross Strings20
Ratio Cross/Mains.616
Main String Grid7.25
Cross String Grid9.87
Density (% of head filled with string).680
Average Cross String Space.495
Average Main String Space.453
Dynamic
Dynamic Tension, Kp, ERT37
Dynamic Tension, Lbs/in206.9
First Moment, Nm.752
Polar Moment306
Torsional Stability14
Swing Weight, Kg/cm2292
Swing Weight, Ounces10.30
Swing Weight Calculated320.4
Power, RDC35
Control, RDC68
Manueverability, RDC92
Power, Calculated 1705.7
Head Points4.41
Head Weight, %48.0%
Center of Percussion20.9
Dwell Time, ms8.50
Efective Stiffness - lbs27.7
K, Lb/In179.4
Recoil Weight138.9
Twist Weight227.0
End Weight 117.8
Tip Weight 180.8
9 O'Clock91.3
3 O'Clock91.2
Butt Cap114.8

 

Head Graphene 360 + Gravity MP Lite

The Gravity MP Lite as you would expect is lighter than the MP by about a ½ ounce with a corresponding reduction in swing weight.  This can be easily remedied by increasing the swing weight while not effecting the ovefrall weight very much.

The MP LIte is a great example of a “customizable” racquet and deserves great consideration by any player seeking a performance racquet that will stay with them for a long time.

Model Comparison

The head size of 100 square inches is consistent with the Pro and MP models.

Head Graphene 360 + Gravity MP Lite

 

These are not the same racquet but the entire series uses the  two color graphics package with Lava on one side and Miami Green (my words) on the other.  Sort of a fun point!

Take a look at the specifications that follow.

ManufacturerHead
Racquet ModelHead Graphene 360 + Gravity MP Lite
Reference Tension55 lbs - 24.9 kg
String
Head Velocity MLT Black
Machine UsedTrue Tension Professional
Static
ASPS, RDC53
ASPS, FlexFour60.0
Racquet Flex, RDC59 - After stringing
Racquet Flex, FlexFour45
Racquet - In Plane Stiffness331.5 lbs/Inch
Weight, Grams292.0
Weight, Ounces10.3


Balance, mm333
Balance, Inch13.11
Length, Cm68.6
Length, Inch27.008
Head Width9.94
Head Length12.85
Head Area, cm2647.1
Head Area, Sq. Inch100.3
Number of Main Strings16
Number of Cross Strings20
Ratio Cross/Mains.619
Main String Grid7.70
Cross String Grid10.30
Density (% of head filled with string).791
Average Cross String Space.515
Average Main String Space.481
Dynamic
Dynamic Tension, Kp, ERT35
Dynamic Tension, Lbs/in195.7
First Moment, Nm.753
Polar Moment308
Torsional Stability14
Swing Weight, Kg/cm2294
Swing Weight, Ounces10.37
Swing Weight Calculated323.8
Power, RDC41
Control, RDC62
Manueverability, RDC91
Power, Calculated 1757.3
Head Points3.15
Head Weight, %48.5%
Center of Percussion20.9
Dwell Time, ms8.74
Efective Stiffness - lbs27.9
K, Lb/In169.8
Recoil Weight137.6
Twist Weight215.2
End Weight 114.4
Tip Weight 181.1
9 O'Clock88.8
3 O'Clock90.9
Butt Cap113.8

Head Graphene 360 + Gravity Lite

If you guessed the Lite is the lightest model in the Gravity series you are correct, but did you guess  it is also a 104 square inch head?  Two 104 models in the series!  I say “way to go”!

Model Comparison

Head Graphene 360 + Gravity Lite

The 16 x 20 string pattern remains but the spacing is slightly more “open” than the “S”.  The “Lite” is slightly stiffer than the “S” therefore a slightly higher power calculation you will see in the specifications.

The “Lite” can be the perfect racquet for those looking for a 10 ounce racquet, and whose game is “settled in” and are not looking to make a bunch of stroke/technique changes!

The “Lite” will come in the smallest grip size of any Gravity model which is important when fitting a smallish person with a performance racquet!

 

 

 

ManufacturerHead
Racquet ModelHead Graphene 360 + Gravity Lite
Reference Tension53 lbs - 24.9 kg
String
Head Velocity MLT Black
Machine UsedTrue Tension Professional
Static
ASPS, RDC53
ASPS, FlexFour63.5
Racquet Flex, RDC59 - After stringing
Racquet Flex, FlexFour48
Racquet - In Plane Stiffness301.3 lbs/Inch
Weight, Grams284
Weight, Ounces10.02

Balance, mm346
Balance, Inch13.62
Length, Cm68.6
Length, Inch27.008
Head Width10.15
Head Length13.13
Head Area, cm2675.2
Head Area, Sq. Inch104.7
Number of Main Strings16
Number of Cross Strings20
Ratio Cross/Mains.618
Main String Grid7.75
Cross String Grid10.50
Density (% of head filled with string).778
Average Cross String Space.525
Average Main String Space.484
Dynamic
Dynamic Tension, Kp, ERT35
Dynamic Tension, Lbs/in195.76
First Moment, Nm.769
Polar Moment315
Torsional Stability14
Swing Weight, Kg/cm2301
Swing Weight, Ounces10.62
Swing Weight Calculated340.0
Power, RDC42
Control, RDC61
Manueverability, RDC86
Power, Calculated 1877.2
Head Points-.94 (negative = head heavy)
Head Weight, %50.4%
Center of Percussion20.9
Dwell Time, ms8.74
Efective Stiffness - lbs27.9
K, Lb/In169.8
Recoil Weight131.6
Twist Weight217.6
End Weight 100.0
Tip Weight 186.5
9 O'Clock91.4
3 O'Clock92.4
Butt Cap101.6

Head Graphene 360 + Gravity Pro

The Gravity Pro is the racquet all 18×20 players have been waiting for!

Why? Great weight, and excellent swing weight right out of the box!  For players that think the Prestige models are too stiff, (they are not), this model will provide feed-back that the Prestige damps out through the cap system.

Big hitters will benefit from the 18 x 20 string pattern when going for the “flat, down the line” shot.

You will see all the specifications later on but now let’s talk about the reaction to the binary graphics package that is used on all the Gravity models. One side is Lava, and the other side is Miami Green ( my description) which makes for an exciting pickup reaction!

Head Graphene 360 + Gravity Pro

Model Comparison

The excellent stiffness of RDC 60 combines with the dense string pattern to yield an effective stiffness of 30.7.

Now for some fun!

ManufacturerHead
Racquet ModelHead Graphene 360 + Gravity Pro
Reference Tension57 lbs - 25.9 kg
String
Head Velocity MLT 17 Black
Machine UsedTrue Tension Professional
Static
ASPS, RDC63
ASPS, FlexFour68.5
Racquet Flex, RDC60 - After stringing
Racquet Flex, FlexFour46
Racquet - In Plane Stiffness428.6 lbs/Inch
Weight, Grams328
Weight, Ounces11.57


Balance, mm326
Balance, Inch12.83
Length, Cm68.6
Length, Inch27.008
Head Width9.91
Head Length12.85
Head Area, cm2645.2
Head Area, Sq. Inch100.0
Number of Main Strings18
Number of Cross Strings20
Ratio Cross/Mains.694
Main String Grid7.75
Cross String Grid10.25
Density (% of head filled with string).794
Average Cross String Space.513
Average Main String Space.431
Dynamic
Dynamic Tension, Kp, ERT40
Dynamic Tension, Lbs/in233.7
First Moment, Nm.824
Polar Moment348
Torsional Stability17
Swing Weight, Kg/cm2331
Swing Weight, Ounces11.68
Swing Weight Calculated348.6
Power, RDC39
Control, RDC62
Manueverability, RDC66
Power, Calculated 2006.0
Head Points5.35
Head Weight, %47.5
Center of Percussion21.5
Dwell Time, ms8.02
Efective Stiffness - lbs30.7
K, Lb/In201.9
Recoil Weight165.8
Twist Weight240.4
End Weight 132.7
Tip Weight 197.4
9 O'Clock98.6
3 O'Clock99.5
Butt Cap131.1

Head Graphene 360 + Gravity Series Lineup

In addition to individual model specifications we like to do a consolidated series comparison so we can glance at the differences between racquets.  Following is that comparison.  All the data is taken with strung racquets with a vibration damper but no overgrip.

See the Five Models Compared Here

See Larger Images of Each Model Here

So, what is important in this data?  Well, to us, everything or we wouldn’t include it but we like to explain some of the not so obvious numbers.

End Weight:  the weight of the butt end of the racquet when using two (2) electronic scales

Tip Weight:  the weight of the top end of the racquet when usisng two (2) electronic scales

Why important:  this accurately calculates static balance and allows easy maching of multiple racquets

Swing Weight:  the higher the swing weight the higher the energy colliding with the ball.

Why important: this is the most meaningful number in terms of momentum into the ball.

InPlane Stiffness:  this tell us how stiff the racquet is when a load is apllied to the 3 and 9 o’clock positions.

Why important:  a higher number means the racquet is stiff in that direction affecting string bed stiffness.

Stability:      this tell us how the racquet reacts to ball impact.

Why important:  the higher the number the more power and control that can be contributed to the racquet.

Position 1, 2, and 3: three (3) electronic scales are used to weigh the racquet.

Why important: we can match the rotational inertia of each racquet.

Peak Load:   this tells us the peak force of the ball impact on your body.  Higher loads contribute to injury.

Why important:  we can make adjustments to the string bed stiffness to keep the peak loads safe.

Everything else should be clear but if you have questions please “Ask John”

 

%d bloggers like this: