Category Archives: True Tension

Head Prestige 2021 Series Comparative Data

Jumping back and forth between reviews and data is not fun nor is it efficient so we have been posting comparative data. Now all the important stuff is in one place.

All of the data is based on a “play ready” racquet.  That means an overgrip and vibration damper, and unless otherwise noted…string!

As you are looking at the data try to determine which numbers mean the most to you and how you could use them.  For example, the Pro has an overall weight of 342 with a swing weight 318.  How does that compare to the MP?

Keep in mind that weight and swing weight can increased but not easily decreased.  No, making the racquet more “head light” statically does not reduce the swing weight as recorded on testing devices that grab the racquet 10cm from the end!  That is why static balance (CG) should not be used as a performance metric.

Click here to see the data!

 

 

Prince RipStick 300

I am not saying the is not a serious tennis racquet but the first descriptor that come to mind is “fun”! And who does not want to have a little fun while playing tennis, huh?

RipStick 300


This is one of the remaining racquets with the “O” Port technology which is very large string openings instead of small grommet holes. The design allows for much more string movement and the 16×18 string bed helps!  The “O” Ports create an effective head size of 105 in a racquet that measures 100 square inches.

But, just look at those colors!  I think they are awesome!

This is a constant taper beam starting at 22.5mm going up to 27mm so if you are “thin beam” person you may hesitate to hit with this racquet, but we think you may be missing out!

If you just look at the racquet you may think it to be quite stiff.  That is not the case!  With an RDC stiffness of 62 after stringing we arrive at an effective stiffness of 30.2 with this string setup.  Not bad!

Take a look at the specs then come get the demo and see what all these numbers mean to you!

ManufacturerPrince
Racquet ModelPrince RipStick 300
Reference Tension60 lbs - 27.2kg
String
Prince Premier 16
Machine UsedTrue Tension Professional
Static
ASPS, RDC59
ASPS, FlexFour64.5
Racquet Flex, RDC62 - After stringing
Racquet Flex, FlexFour46.6
Racquet - In Plane Stiffness504.2 lbs/Inch
Weight, Grams328
Weight, Ounces11.57
Balance, mm323
Balance, Inch12.72
Length, Cm68.6
Length, Inch27.008
Head Width10.00
Head Length12.87
Head Area, cm2645
Head Area, Sq. Inch100.1
Number of Main Strings16
Number of Cross Strings18
Ratio Cross/Mains.694
Main String Grid7.56
Cross String Grid9.12
Density (% of head filled with string).679
Average Cross String Space.531
Average Main String Space.469
Dynamic
Dynamic Tension, Kp, ERT36
Dynamic Tension, Lbs/in201.35
First Moment, Nm.814
Polar Moment337
Torsional Stability17
Swing Weight, Kg/cm2320
Swing Weight, Ounces11.29
Swing Weight Calculated342.2
Power, RDC43
Control, RDC58
Manueverability, RDC73
Power, Calculated 2095.5
Head Points6.14
Head Weight, %47.2
Center of Percussion21.2
Dwell Time, ms8.28
Efective Stiffness - lbs30.2
K, Lb/In189.10
Recoil Weight159.2
Twist Weight256.05
End Weight 134.9
Tip Weight 194.5
9 O'Clock100.8
3 O'Clock97.3
Butt Cap130.2

 

 

 

Our Mission

Which Comes First!

We all have heard the question “which comes first the chicken or the egg”?  However, my question is “Which comes first the game or the string”?

I believe they happen simultaneously.  But first a quick story.

In 2005 I was attending a Head product introduction on the island of Mallorca, Spain,  Yes, that one!

The product introduction was exciting but what I am going to tell you about now was even more meaningful.

The Director of one of the top US Tennis Training organizations, at that time, was there and we were discussing teaching techniques and what he said after being in this part of Europe was “we need to start teaching our players how to hit this way!”  Well, “this way” was the way of low-powered strings that were popular in Europe but not so much in the US, yet.

So, it began!  The players could not hit harder, like the Europeans, unless they used the same string material as the Europeans and that was very stiff and mostly PET polyester.

So, the idea was the “egg” and the string was the “chicken”, sort of!  I guess the feeling was that “if Americans are going to compete we must use the same equipment”.

Our history confirms that almost no one plays better with stiff string and durability is suffering!

Now, I believe the professional game can go on about its way but otherwise, we need to consider changing the game by returning to a combination of comfort and playability.

Our history shows us that the “high performance” life span of many polyester strings is about 2-3 hours, or less, maybe about 10-12 games.  We don’t believe this is quite long enough for most players.  But, how do you quantify “performance”?  It may be different things for different players.

There are many components to performance but what if it was associated with UTR data?  Racquet Quest can track UTR numbers and make some determinations based on that data.  If a UTR is stable or increasing it is a good bet that the performance of the player and equipment is OK.  However, if the UTR is slipping it is a good indication that something is not working as it should…but what?

We have found that, in some cases, it is injury or discomfort, that is causing the slippage!  Stop it!  The following data is for a 12 month period and acquired from the UTR website.  Even small positive changes are tough!  But negative changes seem to have an enormous impact more quickly than positive changes!

For example:

PlayerRacquetStringUTR1UTR2Delta
AHead Speed PEEK12.8412.86+ .02
BBabolat Pure AeroPolyester10.919.56-1.35
CHead Radical MPAPEEK4.505.61+1.11
DWilson Pro Staff 97PEEK5.07.03+2.03
EBabolat Pure AeroPEEK3.85.64+1.84
FWilson Blade 98 Polyester10.09.41-.59
GHead Radical ProNatural Gut3.75.15+1.45

This information is provided as a small sample comparison instrument and is not intended to pry anyone away from their favorite setup!  Even if it hurts!

 

 

 

 

Friction v Tension…what wins?

We all know what friction is.  It keeps our cars from sliding around, it keeps us from slipping and in general makes movement possible!

Friction also plays an important part in the string bed of your tennis racquet.  Friction between the strings and the ball create friction which in turn creates rotation.

What are, however, some of the downsides of friction in the string bed during, and after, the stringing process?

Friction v Tension

For more detailed information and a graph showing the forces involved go to our membership site, GASP.network, but in the meantime this image will show the frictional forces at work!

This machine tension head will pull the string (blue) in the direction of the center of the racquet support structure instead of directly out the middle of the grommet.

It is obvious that this will create considerable friction and result in lower tension inside the grommet than outside the grommet.

Our equipment and technique eliminates this friction resulting in a uniform string bed.