Tuning your racquet: swingweight, balance, lead tape adjustments, polarized/ depolarized setups.
After my years of fiddling with lead tape, I would like to share what I know on tuning a racquet by altering the weight and balance.
First off, you should determine the swingweight of the racquet. Swingweight is different from overall weight. It is possible to have a very light racquet which swings heavy. Manufacturers do this by placing all the weight in the head and not much in the handle, so it will still perform. Avoid these racquets because the shock produced by these racquets can hurt your arm.
You can measure the balance of a racquet by balancing it on a rod or hanging it off the side of a table until it leans. Measure the distance from the balance point to the butt cap. Then subtract that number from 13-1/2 inches (the midpoint of the overall length). Let's say you get 12-5/8. That would make it 7/8 inches away from the midpoint. Every 1/8" is 1 pt head light, so you have a 7pt HL racquet.
Baseliners generally like a racquet between 3-6 pts. HL. Serve and volleyers generally like 8-10 pts. HL. But this is a matter of taste.
Let's say you have a 7 pt. HL racquet and you want more power out of it. You can balance it to 4 pt HL by placing lead in several locations.
Putting lead at 12 o'clock will change the balance the most. It will also give you more spin because it pulls the tip around faster on strokes. It is said Federer puts about 3-5 grams of lead on the tip, Nadal 6-8 grams. They put it under the bumperguard. The average club player can just put it inside the rim to good effect. This setup is called a polarized setup. Think "pole" as being "top of the globe", like "North Pole". (However, Federer's balance point is said to be around 8 pts. HL/ 32 mm from the buttcap)
Putting lead at 3 and 9 o'clock will change the balance less, per strip, but substantially also. This setup will give you more solid volleys, because the racquet will be less likely to twist on off centered shots. It will also make flatter groundstrokes more dependable for the same reason. Sampras was known to put gobs of lead along the side inner rim, which suited his flat loop forehand and volleys.
Let's say you wanted an 9 pt. HL racquet instead. You will have to put weight in/on the handle to make this change. You can either remove the grip and place the lead horizontally or vertically down the handle. The problem is that it will make your grip size bigger.
To avoid this problem, you can put the lead tape near the top of the handle and layer it there. Or you can take off the butt cap, by removing the staples, or open the trap door of the buttcap. The handle is hollow, and from there, you can place cotton two inches or less, and put in a known amount of silicone or fishing weight, or poster tack. Measure the material first, so you will know or be able to arrive at the desired balance point later.
I have found that putting lead at the top of the handle works better, because you do not have a reduction in power as you do when putting weight in the bottom of the handle. It is also much easier to put lead at the top. When putting lead at the bottom, I have had too much reduction in power where the racquet feels substantially less responsive.
A mysterious racquet customizer, John Cauthen, advocated putting 50 grams of lead at the top of the handle. I have put 24 grams and feel the difference already. It makes the racquet much more maneuverable, yet produce a noticeable increase in power. Cauthen's claim is that Agassi and Muster had their racquets customized in such a way and thus, rose to number 1 in the world when they did. I do not know if that is true, but I can speak from my own experience only.
Remember, a 4 inches of a 1/4" wide lead is 1 gram. So if you want 3 grams at the tip, multiply that by 4 and so you will need 12 inches of lead. So if you wanted to do a polarized setup, take 6 inches on one side, and 6 inches on the other side of the rim at the top of the frame. It doesn't take a genius to lay it in there, just put it in there nice and neat, then go out and try it.
If the swingweight feels too heavy, either reduce the size of those strips or counterbalance the weight you put at the top, with an amount in/on the handle. Then tune according to your taste. My taste is 8 pts. HL. with 24 grams at the top of the handle. What's yours?
Note: I achieved 24 grams by using 3/4" wide lead tape, using 8 inches length, wrapping the top of the handle twice. I found this tape at the Racquet Doctor for $1.75/ ft.
Tags: customization, depolarized, lead, polarized, racquet, swingweight, tape, tuning, weighting
Replies to This Discussion
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Permalink Reply by Tim Prapong on -
Do you have this application Patrick? I am wondering if it is truly accurate.
I tried the TW forum swingweight tool, which uses the same principle, and didn't find it to be very accurate after counting the time elapsed for 10 swings. It could've been anywhere between 330 to 420 SW.
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Permalink Reply by Joe B. (BP, CA) on -
This is some really good info, Tim. A question though: when you refer to the HL balance, do you mean strung or unstrung? I have my Prince EXO3 Graphite MP racquets balanced about 5-6 pts. HL, strung (stock was 2 pts. HL). I used a whole pack of lead (18 g.) added to the middle/top of the handle. I am a spin player, apparently, with a good amount of topspin on the FH. The problem is my BH swing is a bit slow. Do you think I would benefit from changing to 7-8 pts. HL by adding more lead to the handle, or should I just practice my swing? Will I lose too much power by doing so?
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Permalink Reply by Tim Prapong on
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I always refer to the HL balance strung. Different strings will shift the overall balance differently. So I see you have it at 5-6 pts HL.
Here is a possible problem moving it to 8 or 9 pts, when it was originally 2 pts HL and you've moved it to 5-6 pts. already. The racquet may begin to play lacking in power the higher the headlight balance. The manufacturer, say Prince here, designed the racquet's playability at certain specs. If you change the specs too much, it may play badly with little response.
Gasquet likes his balance to be 10 pts. HL on a Liquidmetal Instinct MP. I like mine to be 9 pts. HL on Youtek Prestige Mid. You could add another 18 grams to the handle and see what happens. Or you could put on a leather grip plus an overgrip, the classic one handed backhand player's solution. A one handed player likes more head speed and "whip". 5-6 pts HL is more of a baseliner two handed player's racquet.
You might like trying a different racquet more suited to a one handed player with a smaller head, and more headlight balance. There's a reason why Federer does not switch to a 98 or 102 head. It's this reason: he wants more HL balance and more precision out of a smaller head size, especially on his slice backhand and his 3/4 topspin backhand.
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Permalink Reply by Tim Prapong on
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If you want to increase the speed of your backhand swing, without resorting to all of this, start taking your racquet up higher, above your shoulders. You can also experiment with rolling your shoulders and having a rolling heel to toe action too.
Taking back the racquet straight back requires more strength. I prefer to use gravity and potential energy rather than jerk the racquet out through a straight plane. I don't have big forearms or shoulders. I have a relaxed arm which speeds up through supination (the opposite of pronation). You maybe using little supination as well. Using more supination can greatly increase racquet head speed.
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Permalink Reply by Joe B. (BP, CA) on
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That makes sense. I'll probably leave it as is. The power is still good, but I worry about playability. It's too bad not many manufacturers make a green racquet, he he he!
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Permalink Reply by akajohn on -
I was not visiting this place for very long time and I'm sorry about but meanwhile I played a hell lot of tennis :) I changed my racket moving from Aero Pro Drive GT to the latest Roddick Pure Drive and this season I was using just this one with a Signum Tornado Pro string at 25 kg tension... Totally the racket weights around 344 grams... And now came the problem... After 10 months of playing without any problem I was insisting more on service power plus too many hours on court and I start having pains in elbow... I love my Pure Drive Roddick rackets but because of stiffness and stringing I have pains currently while serving... Meanwhile I bought a Wilson BLX ProStaff 95 16/19, 11 oz/ 313 gr (not stringed) .... So, I like the control on this racket but is too slow for my style and even usually I hit hard and with a lot of spin (semi-western) with this racket the ball just slowly flies away in comparison with my usual Roddick PD :) So, I want to add some lead tape and some weights in handle to increase the power while keeping the balance quite similar to current one... I want to keep this Wilson as good as it is at the net but just to increase plow through and power a little bit... So, if I add weight in handle, around 15-20 grams plus another 15-20 grams in "head" around 10 and 2 o'clock area do I get what I want? What do you advice me? Anyway, first of all I will work at strings but I want to add some consistency to this racket for baseline hits... For me looks wipy, meaning that you can easily accelerate the head of the racket, but inconsistent...
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Permalink Reply by Tim Prapong on
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If you add 15-20 grams to the hoop and the same amount to the handle, you will get alot of static weight. You will also really increase the swingweight. The balance will change also depending where you put the lead exactly.
Question is, do you want more maneuverability (more lead in the handle) or do you want more stability (lead at nine and three o'clock for volleys)? Do you want more power (lead in the hoop) or do you want more control (lead in the handle)? Do you want more spin (lead at 10 and 2 o'clock, or lead at 12 o'clock)?
Any case, I would try 2 grams at a time in the hoop, 4 grams at a time in the handle. Putting lead in the hoop has a more measurable effect the closer it is at the tip. I would not merely try to match the overall weight of the Pure Drive on the Wilson. I would rather go gradual and build up, rather than waste a bunch of lead, having to peel off the layers.
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