Category Archives: Technology

Head Graphene 360+ Gravity Tour

Head is adding another racquet to the very popular Gravity Series!  This racquet is the Gravity Tour and in a nutshell, is a lighter version of the Gravity Pro.  Both are 18 x 20 string patterns and, the Gravity Tour is a 22mm beam as opposed to a 20mm beam for the Gravity Pro.

Head Graphene 360+ Gravity Tour

You would think the 22mm beam would be stiffer (power?) than the Gravity Pro, but in this case the extra weight of the Gravity Pro makes it a little more power forward. Our tests show the RDC stiffnesses to be the same (60), and the FlexFour shows the Gravity Tour slightly stiffer in the shaft, 51 as opposed to 46 for the Gravity Pro.

From a numbers standpoint this racquet (14 grams lighter) will fit a player wanting a little more maneuverable racquet but not as powerful as the Gravity Pro. ← Click on this link to see the review.

This review is of a “play ready” racquet.  That is an over grip, and vibration damper.   These accoutrements do contribute to weight and swing weight to a minor degree.

ManufacturerHead
Racquet ModelHead Graphene 360+ Gravity Tour
Reference Tension55 lbs - 24.9 kg
String
Pro Evaluation String 1.20mm
Machine UsedTrue Tension Professional
Static
ASPS, RDC58
ASPS, FlexFour70
Racquet Flex, RDC59 - After stringing
Racquet Flex, FlexFour51
Weight, Grams324
Weight, Ounces11.43

Balance, mm329
Balance, Inch12.87
Length, Cm68.6
Length, Inch27.008
Head Width9.92
Head Length12.86
Head Area, cm2646.6
Head Area, Sq. Inch100.2
Beam Width, mm, Shaft, Center, Tip22, 22, 22
In Plane Stiffness, Pounds/In319.1 Lbs/In.
In Plane Stiffness, Kg/cm144.7 Kg/cm
Number of Main Strings18
Number of Cross Strings20
Ratio Cross/Mains.694
Main String Grid7.87
Cross String Grid9.80
Density (% of head filled with string).763
Average Cross String Space.490
Average Main String Space.433
Dynamic
Dynamic Tension, Kp, ERT38
Dynamic Tension, Lbs/in212.54
First Moment, Nm.797
Polar Moment329
Torsional Stability15
Swing Weight, Kg/cm2314
Swing Weight, Ounces11.08
Swing Weight Calculated337.9
Power, RDC40
Control, RDC62
Manueverability, RDC77
Power, Calculated 1856.8
Head Points4.88 (negative = head heavy)
Head Weight, %47.7%
Center of Percussion21.2
Dwell Time, ms, No Swing8.35
Efective Stiffness - lbs29.2
K, Lb/In (SBS) RDC185.9
Recoil Weight153.46
Twist Weight232.2
End Weight 125.9
Tip Weight 192.8
9 O'Clock98.4
3 O'Clock97.2
Butt Cap122.0

Yonex VCore Pro 97 – 310

Yonex continues to introduce upgrades to the most popular racquets they have produced recently and these new VCore Pro series is a great example of positive changes.

This series continues to be made in Japan and it is obvious in the consistency of their racquets.  The deep Forrest Green and Gold graphics creates a “strong” looking racquet which will appeal to players.

This model is the 310 gram (10.9 oz) version (unstrung)which gains about a ½ ounce when strung and presents a very usable 315 kg/cm² swing weight.  Right out of the box this will suit a lot of players.  Of course a little customization can be done if required.

When looking at racquets it is clear that this Yonex Series all look alike!  A closer look at the head will give you the weight and head size.

The 16×19 string pattern in the Isometric Head Shape creates a large “comfort zone” area and long main strings near the edge of the racquet face which contributes to that “comfort”.

 

ManufacturerYonex
Racquet ModelYonex VCore Pro 97 2019
Reference Tension55 lbs - 24.9 kg
String
Pro Evaluation String 1.20mm
Machine UsedTrue Tension Professional
Static
ASPS, RDC49
ASPS, FlexFour65
Racquet Flex, RDC61 - After stringing
Racquet Flex, FlexFour46
Racquet - In Plane Stiffness368.1 lbs/Inch
Weight, Grams324
Weight, Ounces11.43

Balance, mm323
Balance, Inch12.72
Length, Cm68.5
Length, Inch26.968
Head Width9.55
Head Length12.54
Head Area, cm2607
Head Area, Sq. Inch97
Number of Main Strings16
Number of Cross Strings19
Ratio Cross/Mains.641
Main String Grid7.00
Cross String Grid9.75
Density (% of head filled with string).766
Average Cross String Space.542
Average Main String Space.438
Dynamic
Dynamic Tension, Kp, ERT33
Dynamic Tension, Lbs/in184.57
First Moment, Nm.804
Polar Moment329
Torsional Stability14
Swing Weight, Kg/cm2315
Swing Weight, Ounces11.11
Swing Weight Calculated338
Power, RDC48
Control, RDC50
Manueverability, RDC77
Power, Calculated 1807.7
Head Points6.14 (negative = head heavy)
Head Weight, %47.2%
Center of Percussion21.1
Dwell Time, ms9.09
Efective Stiffness - lbs27.2
K, Lb/In157.05
Recoil Weight156.18
Twist Weight221.85
End Weight 133.7
Tip Weight 190.6
9 O'Clock97.6
3 O'Clock95.9
Butt Cap131.1

 

Pssst…want to try something?

If you read our recent post about “How to Demo a Racquet,” you may be incentivized to do it!

So while you are at it try one of our performance racquets setup with MonoGut ZX or ZX Pro (thinner) to get the maximum performance from the racquet.

Ashaway MonoGut ZX and ZX Pro have been one of our most popular strings for well over five (5) years!

Top players have been using it, but now the word is spreading that is not just for “the good player” but for everyone! We are very sensitive to injuries and injury prevention, so that is why we recommend MonoGut ZX to almost all players. The durability and feel of this string are unique, and, MonoGut ZX and ZX Pro is a monofilament but is PEEK and no polyester.

As with any string, some will not want to change, but if you are looking for a new racquet, why not demo a racquet setup with MonoGut ZX or ZX Pro?

MonoGut ZX & ZX Pro

Ashaway MonoGut ZX and ZX Pro come in Black and Natural and 16 (1.27mm) and 17 (1.24mm) gauge.

How to Demo a Racquet

We have what seems to be a zillion demo racquets, and there is a player for each of them, I suppose.

One of the biggest complaints against “demoing” is precisely that…too many to choose from!

This is what we recommend;

  • Start the convesation with yourself before you need to make a decision.  Allow a month before the “season” starts if you can,and start the conversation with us early on.
  • What do you want that your current racquet is not providing.
  • What is your budget.  If you are a junior what is your “sponsors” budget.
    • With these three questions you are well on the way to a painless “demoing” expreience!

Here is what we would like to have to speed up the process:

  • Bring your current racquet in “play ready condition” with you to the primary discussion.
  • Tell us what has changed physically since you selected the current racquet.
    • Injuries, including tennis elbow, shoulder and wrist issues, or a long layoff, etc.
  • What do you want the new racquet to do that the current racquet is not?
    • Power, or “POP”, Control, Comfort, Grip Size, String Issues, etc.
  • Do you have a brand preference?
  • If we can make your current racquet better will you not demo other racquets?
    • It is possible that the current racquet can be better than it is so demo it as well after some customization.
    • Tell us if this is of interest or “I want a new racquet…period!

With this information we can make the demoing process much more fun,consise, and ultimatley rewarding, and in a much shorter time period.

Our demo process is free however we believe the racquet should be “setup” just as it will be used which may require stringing and a litttle customization and there will be a charge for that if you agree.

Our huge database of racquet specifications allow a quick look at the characteristics you prefer.

We think you wil be surprised at how much fun the demo process can be!

 

 

 

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

 

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