Ultimate String Weight Thread!

[Donmikan]

thanks!

I found it! I wasnt the paper itself, but an article from the same author where he quotes his own paper. All the way at the end:

A New Twist on the Twistweight of a Tennis Racquet - Tennis Industry

 

[tele]

.

Nice find!

Howard Brody sadly appears to have passed away in 2015. I discovered he actually coauthored a book with TWU prof Crawford Lindsay and Rod Cross(The Physics snd Technology of Tennis), which I should order next time I get something from TW(It is otherwise very expensive where I am).

edit:sorry that I somehow deleted your post when replying

 

[_FrankTheTank_]

Another thing that plays into their hand is the OCD and precision seeking of forum members, promoted by a few guys, when in reality these minimal spec differences are exagerated in our heads only when we find out the measurement. (placebo) Up to 2.5% difference in swingweight wasnt noticed by college players, thats plus minus 8sw from 320. So, is there even need to match perfectly, considering even the swingweight machine can be inconsistent as it is affected by temperature and humidity a bit, and needs to be calibrated often?

Is the 320 SW your example or is it a value from the study? Coudn't find it in the articel you posted later. As the study is from earlier than 2005, it might be based on heavier swingweights, as I can't imagine people wouldn't notice a 312 vs a 320 or a 320 vs 328 difference ....

 

[Donmikan]

Is the 320 SW your example or is it a value from the study? Coudn't find it in the articel you posted later. As the study is from earlier than 2005, it might be based on heavier swingweights, as I can't imagine people wouldn't notice a 312 vs a 320 or a 320 vs 328 difference ....

This is the exact quote:

In a related study, the same players required a difference in swingweight of at least 2.5 percent to distinguish two otherwise identical racquets (same balance, total weight and twistweight) from each another.

Now to get nitpicky, according to the study, they WOULD notice a difference between 312 and 320, as it is exactly 2.5% difference. But they wouldnt notice 313 vs 320

We can speculate on which values of swingweight they used, and as you say, in 2005 (2000 was the study actually) swingweights were higher. But take a look at some of the most popular rackets from that period, swingweight averages about 335 i would say, maybe even less. Its the total weight which changed more since. And i would have some belief in this particular researcher that he did his due diligence and had tested a wider variety of swingweight values.

There might be confirmation bias from either or both of us, but from my perspective it makes total sense. When you consider the fact that even the sw machines get affected by all factors contributing to air resistance and need calibration often, and because of all these disruptions they might be off by, for the sake of argument, at most 2sw.

Pick up something that weighs 1 gram, for instance a paper clip. (or two) You barely notice it in your hand. When one gram is placed at 12 o clock, it increases the swingweight by a bit less than 3 kg*cm^2. I could never say that we humans are calibrated enough to notice that one gram, even at the furthest point of the racket.

 

[_FrankTheTank_]

Pick up something that weighs 1 gram, for instance a paper clip. (or two) You barely notice it in your hand. When one gram is placed at 12 o clock, it increases the swingweight by a bit less than 3 kg*cm^2. I could never say that we humans are calibrated enough to notice that one gram, even at the furthest point of the racket.

I would say that the minimum weight we notice is, or very close, but this way its memorable:
3g at 12,
6g at 3 and 9,
9g in the handle

It's hard to tell whats felt physically and whats imagination and in generall how sensitive the avarage tennis player is. I think I lately read something about Fraces Tiafoe and his process on racket customization, and the wording of his team was something like that they added 4g which totally slowed his swing down and then added just 2g and it was perfect.

 

[Donmikan]

It's hard to tell whats felt physically and whats imagination and in generall how sensitive the avarage tennis player is. I think I lately read something about Fraces Tiafoe and his process on racket customization, and the wording of his team was something like that they added 4g which totally slowed his swing down and then added just 2g and it was perfect.

If you could link that, it would be appreciated. To add to the conversation, you did remind me of what Roman Prokes said about Tiafoe trying to add weight, but he says 5-6 grams, locarion unspecified, and that Tiafoe really disliked the change. It should be noted that he actually knew about the difference, which could affect his perception.

The Tiafoe part starts at 8:23

 

[_FrankTheTank_]

If you could link that, it would be appreciated. To add to the conversation, you did remind me of what Roman Prokes said about Tiafoe trying to add weight, but he says 5-6 grams, locarion unspecified, and that Tiafoe really disliked the change. It should be noted that he actually knew about the difference, which could affect his perception.

The Tiafoe part starts at 8:23

Found it. Interestingly Prokes is quoted/interviewed on the Article.

What's behind the tennis world's move to lighter racquets? | Tennis.com

For the current generation of champions, less racquet weight equals more performance.

www.tennis.com

 

[Donmikan]

Found it. Interestingly Prokes is quoted/interviewed on the Article.

What's behind the tennis world's move to lighter racquets? | Tennis.com

For the current generation of champions, less racquet weight equals more performance.

www.tennis.com

Thanks. Here is the quote for everyone interested:

"We added 2g to the tip of the frame and it worked great,” says Prokes of Tiafoe’s Yonex. “But when we went up to 4g he felt it slowed his swing down too much. And Frances is a big, strong guy—he can obviously handle the extra weight"

I wonder if they did it by going +4g immediately, then reducing to 2g, or if they did it +2g twice and then going back.

 

[dragoncino]

Hi, anybody has the weight of 12 meters of Multifeel 17 (1.25) black?

 

[Tommey]

Hi, does anyone know how much of a swinweight would Alu Power 1.25 add to a 100in, 16/19 racket? Is that, by any chance, possible that HyperG in a 1.20 gauge has increased the swingweight more than Alu Power 1.25?

 

[eb_tennis_247]

I got these Mach-10 17 measurements by | unstrung - strung | racquet subtraction. Measured twice on a kitchen scale. Mach-10 is a pretty light string.

100sq, 16x19 pattern

String Job	Gauge (mm)	Weight (g)
Solinco Mach-10 17	1.20	15

 

[eb_tennis_247]

I got these Hyper G 17 measurements by | unstrung - strung | racquet weight subtraction. I measured 3+ times on a kitchen scale.

100sq, 16x19 pattern

String Job	Gauge (mm)	Weight (g)
Solinco Hyper-G 17	1.20	16

 

[_FrankTheTank_]

Hi, does anyone know how much of a swinweight would Alu Power 1.25 add to a 100in, 16/19 racket? Is that, by any chance, possible that HyperG in a 1.20 gauge has increased the swingweight more than Alu Power 1.25?

According to Conrado85 measurements this shouldn't be the case (not a 100in but relation is the same):

Weight (stringer) in H22 18x20:

Alu Power 1.25 - 17,5g
Tour Sniper 1.25 - 18,3g
Hyper-g 1.20 - 17,5g
PTP 1.25 - 17,8g
Cyclone 1.25 - 18,7g
Hawk touch 1.30 - 18,6g
Confidential 1.20 - 17g

 

[Elrico]

Gosen G-Tour 2 16L 1.25mm, set length with the ziptie and no packaging : 20.85gr
100 in² 16x19 4knots : 16.60gr (+31 SW)

 

[Elrico]

Solinco Revolution 18 1.15mm, set length with ziptie and no packaging : 20.51gr
100in² 16x19 4knots : 16.30gr (+30SW)

 

[Dre2010]

These are exactly as strung in:
100 sq.in, 18x20 Head Speed Pro,
with any slack removed and no zip ties.

Dunlop Black Widow 17 (1.20) = 17 grams.

MSV Focus Hex Soft 17L (1.20) = 17 grams

This is correct in the Speed Pro 2024 (18x20) and consistent with what I’ve found.

- MSV Focus Hex Soft 17L (1.20) = 17 grams

Additionally in this racquet and pattern:

- Solinco Confidential 16 (1.30) = 21 grams
- Solinco Confidential 16L (1.25) = 18 grams

 

[J D]

A few more strings to add to my list on page 1 (weight is per 40 feet):

Solinco Mach 10 (1.25) - 20.5
Solinco Hyper G Round (1.25) - 21.6
Solinco Tour Bite 16L (1.25) - 21.0
Solinco Tour Bite 19 (1.10) - 16.5

 

[Conrado85]

Lynx Tour 1.25 Champagne - 45 lbs (Gravity MP 16x20): 18,2 g