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.
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”
If you read “Play Like a Girl,” you will have a good idea where this is headed! This part is intended to make it possible for you to experiment without feeling “forced” so it is based on “numbers” not “feelings.” Of course, feel is relevant to tennis players.
Two events this week make it easy to compare numbers and feeling.
- A racquet came in from a tournament playing junior that had the good fortune of picking up a competitors racquet and recognize the difference immediately and wanted to try it. His racquet is a Babolat Pure Strike 16×19 with a swing weight of 302! The racquet he picked up has a swing weight of 341! His revised swing weight is 325.
- A really good young lady is switching racquets and string setup, so there is a four (4) inch strip of 1/4″ tape on the inside of each side of the string bed in the 3 and nine o’clock position — total weight of about 5 grams, for a swing weight of 321. During a training session, a coach said the racquet was too heavy and removed about 2 inches total of tape, maybe 1.5 grams, and everything was fine! This player is strong enough to play with a 335 swing weight so was this a “visual” suggestion, and the process of removing tape convinced the payer that the racquet was now much lighter?
In case you don’t remember there are 28.35 grams per ounce. So you can see that 1.5 grams is quite small!
Did you know that a dry overgrip is about 5 grams and a wet over grip can be as much as 12 grams? The location of an overgrip (under your hand) has virtually no effect on swing weight so it generally goes unnoticed.
Unless agreed upon in advance most weight can be removed or re-located so don’t fear your friend…weight!
Yes, I mean it!
Keep reading to see why I suggest you “play like a girl.”
About a year ago, a little girl, Meera, about 12 years old, came into the World Headquarters to demo a few racquets. She was committed to getting better and wanted a racquet that would help her.
After a few demos, she selected the Head Graphene Touch Radical Pro. During the discussion of how we were going to set up these new racquets, I mentioned the Head Pro Cap System that is compatible with this model.
If you are not familiar with the “cap” system, it is the plastic parts that fit over the head of the racquet to protect the string. All racquets have a grommet set, but the “cap” system encloses the string as it is installed therefore is more substantial than the standard grommet set. The racquet on the left has the “cap” system.
She purchased two (2) Head Graphene Touch Radical Pro, one with and one without the cap system.
So, other than doing a great job of protecting string it also provides additional inertia, or momentum, that blasts the racquet through the incoming tennis ball!
This momentum creates stability, and a stable racquet will be more powerful and controllable!
But wait, what about all that additional weight? That is the question we hear anytime we suggest adding weight to a racquet.
Weight is your friend! Every player is different so matching the racquet to the physical capabilities is critical!
It was so much of a friend to Meera that she quickly came in to have the second Head Graphene Touch Radical Pro fitted with the “cap” system and both racquets fitted with a Head Leather grip! The leather grip adds about 10 grams to the rear end of the racquet.
So, what are the specifications of this racquet that is being used successfully by a 12-year-old girl?
Take a look at these then tell me you can’t use a “heavier” racquet:
Weight: 360 grams (12.7 ounces)
SwingWeight: 344 Kg/cm² (12.1 ounces)
Points Head Light: 8.03…yes, still very much headlight!
Torsional Stability: 22…very good!
Recoil Weight: 176.9
Twist Weight: 246.9
*Ereca End Weight: 153.0
*Ereca Tip Weight: 207.0
*Ereca is a French company that designs and manufactures racquet diagnostic equipment.
Do yourself a favor and Play Lkie a Girl!
There is more to this story so keep checking back, and, if you have questions please click on “Ask John” above or respond to this post and I will try to answer them.
Nope, this is not a smartphone app! This is even better!
This digital pick up system is designed to prevent premature aging and premature bumper guard destruction!
Here’s the deal…we see way too many tennis racquets that have been rendered nearly useless because the protective bumper guard, that plastic thing that fits over the top portion of the racquet, has been totally ground away by scooping the ball up with the top of the racquet then placing the ball against your foot and dragging the ball up your leg!
A client was in yesterday with two (2) used racquets that were for sale. At first glance racquet #, 1 looked OK but with the typical “ball scooping”
abrasions on the top. A quick probe did not reveal a hole in the graphite fiber so a new bumper guard would be a “cosmetic” necessity.
Racquet #2 did have a new bumper guard which was a “red flag” of sorts. We removed the new bumper guard which exposed significant damage to the racquet to the extent that the graphite fiber was completely worn away! Obviously, this racquet was not worth much.
The digital system eliminates this destruction of the bumper guard and benefits your flexibility.
Here goes: when standing in front of a ball bend at the waist a little and bend the knees enough to reach the ball. Now with the thumb and first two digits (first and second finger) grab the ball and pick it up!
What could be easier!
If you are holding a racquet you can place quite a few balls on the string bed and carry them to the ball hopper!
If you are thinking about telling your racquet technician this destruction is due to your “aggressive playing style”, forget it. Just start using the “digital ball pick up system” so you will not be faced with this embarrassing question.