WHAT IS SWINGWEIGHT? HOW DOES IT EFFECT YOUR TENNIS SWING?

[@андрейенютин-ы5ъ]

Weight on 9 and 3 swing - spin and trajectory height. On 12- power and rebound height reduction.

[@BorisBecker1872]

I like how the UPS deliverer is a reoccurring character on the show. Give Elliott more camera time next time. Would love to know more about him.

[@tberry79]

Me too, but Elliot didn’t seem interested in staying very long.

[@WaltKurtz68]

Yeah, and maybe an Elliot spin off in 2023 ;-)

[@kimmorrison9169]

No, we don’t need more Elliot! He’s on a tight dely schedule. UPS watches these guys closely.

[@BorisBecker1872]

@@WaltKurtz68 Yes. DeliverySpin. Where Elliot puts his spin on your packages. 📦

[@WaltKurtz68]

@@BorisBecker1872 🤣👍

[@transamination]

At 16:00 I get what you're saying about short-court. I find mini-tennis warm up (groundstrokes in the service box) difficult to do with higher swing-weight racquets, but those racquets are then great at hitting through the court from the baseline.

[@silviosarunic3234]

Swingweight is a dynamic parameter, which can be defined as the moment of inertia I, also known as the rotational inertia. Rotational inertia of a rigid body (racket) is used to determine how much torque is needed to achieve the desired angular acceleration about the rotational axis. Let’s take a look at the axes of the racket again. The moment of inertia of a rigid composite system is the sum of the moments of inertia of its component subsystems that are at the distance r from the same axis. Now we can write down the general equation for the moment of inertia. Ip=∭ρ(x,y,z)⋅||r||2dxdydz (1) There are 2 parts of the equation. The first is the integration of the density over the whole volume of the racket, which represents mass, and the second part is the radius or distance r of the mass particle from the rotational axis. For the purpose of racket modification, we don’t need the equation in this form, and we can write down a discretized form. Ipy=∑ni=1(mi(ri,y)2) (2) Now we get the expression for the moment of inertia I around the axis Y, as the sum of moments of inertia of all the mass components. In practice, those mass components can be strips of lead, vibration dampener, strings etc. that are at distance r from the Y-axis. But in tennis, we use swingweight, which is just a moment of inertia about the parallel axis to the Y-axis, as shown in the picture below. We can see that the parallel axis is 10 cm from the axis Y. This is just the industry standard or I should say an arrangement. The axis is set at a distance of 10 cm because of the way we hold the racket, and the pivot point of the racket is not about Y-axis. Of course, this depends on the grip style we use, how big are our hands etc., but we need some common grounds to characterize rackets. If you know the moment of inertia about any given axis, you can calculate it about any other parallel axis. The final expression for swingweight is as follows. SW=∑ni=1(mi(xB,i−10cm)2)

[@tonybryant1839]

Very interesting. I have a racket with 325 SW, but it feels like it has a heavier swing weight. I think I now understand why... It has overall weight that is centered just below the throat and above the grip.

[@thelolguy007]

You hit the nail on the head here 17.00 ....... Rackets are the weight they are because most players are normal people looking for some fitness, activity and fun etc. Those more serious about it can customise it for their own liking etc

[@joselitoaquino3207]

Very Informative and helpful thank you Tennis spin..

[@saucyscone]

Affect

[@robg7892]

Swing weight is literally a measure of how difficult it is to rotate the racket around the end of the grip. That's it. The number is proportional to weight times the distance from the end of the grip square. 10 grams in the butt won't change swing weight hardly at all since distance is basically zero.

[@LarzB]

Small correction, swing weight is the measure how much the racket will resist changing the swing speed. So it will resist acceleration more with a higher swing weight and it will resist slowing down more as well. It's about changing the swing speed.

[@robg7892]

@@LarzB what you are explaining is just mass. Or colloquially, weight. Mass is the resistance to changes in speed.

[@LarzB]

@@robg7892 no, static weight is mass. That is the weight you feel pulling down to the earth due to gravity. The higher swing weight makes you feel slower as it takes more effort to accelerate the racket head. Swing weight is a measure of inertia. Which exists in 3 ways. Swing weight, spin weight and twist weight. And all 3 inertia manifest themselves as a resistance to change in their corresponding rotation axis. Swing weight in the horizontal rotation speed changes, the spin weight in the spin wipe direction speed changes and twist weight in the direction of twisting the racket around its length axis.

[@robg7892]

@@LarzB okay dude. Thanks for the advance course in moment of inertia, which is exactly what I described in my first comment. It is the resistance to changes in rotational speed. 🤦‍♂️. Mass is literally defined as the amount of inertia of an object, and is a measure of how hard it is to change it's speed, it just also happens to be proportional to the effect of gravity too. I'm not going to reply to you anymore. You win.

[@enematwatson1357]

10 g (0.01 kg) concentrated right at the butt end (10 cm from the pivot point) should make exactly a 1 point difference, shouldn't it? 🤔 0.01 kg times 10 cm squared = 1 kg. cm²

[@benjaminjensen111]

To general info in video. its more complicated than that. Rule of Thumb: Higher swingweight = better player. Though...... beginner rackets has head heavy balance as they are light weight over all and they reduce the mostly the weight where there is no ball impact to not take away to much stability and so there is still power from racket. Thsi means you can buy a racket that weighs 270 with 300 swingweight (SW) With Intermidiate players you have more even balanced at 34 cm strung/33 cm unstrung racket and the racket will weigh 285-300 gram and may also 300-310 swingweight. With very advanced players you typically have a racket weighing 320 grams. Now the balance is typically only 31 cm unstrung-32 cm strung, such the swingweight is not getting redicoulus by having headlight balance. Whether you want to hit flat or with spin then is all in the technique and level of you.

[@billyskittle7826]

thank you for your videos, I really like your philosophy, and of course all your technical advice which I find very relevant.

[@sefermemisoglu3800]

Thanks for the content, Harry! Can you also talk about the twist weight of requests? Greetings from Amsterdam!

[@shroud1390]

Good vid. My swing weight is 469. Definitely a flatter trajectory.

[@carlosjara9136]

I moved to a higher swing weight and I noticed it right away on the court. I’m hitting much flatter than before. I love hitting with tons spin. It would be nice though to hit with topping AND have it be heavy/penetrating . So would I have to just swing faster with the head heavy racquet to do so? I don’t play too frequently we’re it would hurt me anyways. Ironically because I was hitting flat, I ended up decreasing my swing speed which made the ball even flatter 😂 I have not tried to increase my swing speed thinking that would make the ball even flatter

[@tberry79]

Thanks Harry!

[@spyghetti]

almost beefed up Fed specs in the Frankenstein.

[@EthanMatthes]

Maybe you’ve covered the swingweight chart and machine in a previous video? Interesting topic.

[@pedroleitedefaria7255]

GOSEN IS FANTASTIC I USE G TOUR 3 1.18 AND IS THE BEST

[@PaganTaylor]

I understand customisation, but when a racket is so heavily customise doesn't it just indicate that the racket is wrong for you? Customising a racket is normal, but when every spare space has weight added to it, it's basically a different racket. It confuses me as to why one doesn't get racket closer to the weight preferred, that also has the touch you're looking for.

[@raychayyc]

The rackets in his selection are meant more for intermediate or advanced players. He should probably be using a power or game improvement racket instead of customizing these rackets. A little lead is ok but he adds way too much.

[@TrumpforPresident24]

Harry can we go back and talk about tension. If a 90 sq better at 45-50. 97 sq better at 55-60. 100 sq better at 60-65. 107 sq better at 65-70. So on so on. I'm just calculating at the racket level. I know people can have their own preference tension. Let's just say you have the best high racket tech and the best high level string. Would those tension best prefer.

[@TrumpforPresident24]

Maybe a 90 is better at 50-55 lbs? Although Federer plays his at high 40, like 45-50. I haven't test a 90 so I don't know yet.

[@evylsalamie]

When I used to play with a Yonex Vcore Tour 89, my preferred string and tension was Yonex Polytour Pro 120 @ 50/48 lbs. Strung 2 piece on a lockout crank

[@TrumpforPresident24]

@@evylsalamie ahh, I see, I thought so too at that tension. Hybrid is the way to go. Synthetic main, poly cross, I'm just going to do that for now. I have play a full poly bed, it just depends if you have the soft type or hard type. Soft type will feel plushy. Hard type feel solid, I think, like synthetic gut but maybe more solid then synthetic gut, I haven't test the hard poly type yet either to see if they are more solid than Synthetic Gut. Going to go buy some Hard Gosen Poly and hybrid with Synthetic Gut.

[@jerryshi88]

Hi, I was curious, I work with college athletes and I wanted to know what balance, swingweight, and static weight scale machines you recommend for customizing rackets? Thank you so much!

[@jerome_morrow]

The 3-in-1 machines are expensive. Consider a Briffidi?

[@yimingzhh]

The only affordable and accurate enough solution so far is Briffidi SW1.

[@jerome_morrow]

@@yimingzhh I think some people might even argue that the SW1 is even more accurate, especially when measuring twist weight.

[@biondipepe]

I wonder why don’t you use a heavier racquet from stock weight in stead of adding that ridiculous amount of weight? To me that means that’s not the racquet for you from the get go. I understand something like that on someone that is broke and has only one racquet. In that case is cheaper to spend 10’bucks on lead tape and make it work

[@KidInTheHallway]

Hey Harry! You said that you dont take measurements till after you find what you like feelwise. Do you match them all before that?

[@jerome_morrow]

Do you think your spasmodic, chronic late-hit forehand might be (partly) down to using far too heavy a racquet than you should? It looks like you’re not able to get to contact in time in most of your forehands. You can’t even get the timing right with a stock racquet as it is. Fix your technique than fixate about lead. Ask one of your many coach buddies to help you.

[@lenaarl.]

Wow someone woke up and thought "I'm gonna a be toxic today" 😒

[@ReD4eva94]

I'd pay to see you play him keyboard warrior.

[@jerome_morrow]

@@lenaarl. I have no idea what you mean. There’s nothing in my comment above that isn’t factually true. Also, you’re the one who chose to hurl an ad hominem remark. Spend enough time on this channel and you’ll hear Harry constantly bragging about how he loves lead, can’t use anything but 2x4s, very heavy racquets etc. He sells himself as some sort of authority on customisation. Yet no one competent in customisation would do what he does. There are many gains to be had fine tuning racquet specs to an individual player’s needs. Eg: tendency to get to contact too early (framed shots on the upper hoop that go out cross court), small bit of lead at 1200 can help to slow the tip down leading to better impact timing. Yet here on TS, we have a “gear expert” with a chronically late hit technique who keeps droning on about his need for weight, when even with light weight racquets, his contact is way late. 🤷‍♂️

[@dustyroot4708]

His groundstrokes are busted, and yes, he does hit late and slaps at it. I haven’t seen him drive through a ball in three years. I do appreciate the daily content, but never use this channel as an Authority.

[@raychayyc]

Due to his short strokes, he cannot get the plough thru & depth? That's why he adds lots of lead to increase swing weight to compensate for his lack of swing?

[@glenparis]

If you know the weight (strung) and the balance, can you calculate the swing weight (without measuring). If not, what are the additional factors that go into swing weight (besides balance and weight)?

[@zapoi67]

The mass distribution over the racket. That's why measuring is the easiest way to go

[@yimingzhh]

No you cannot. Weight distribution.

[@Better_Call_Raul]

Yeah, that is confusing. If the weight and balance have been measured, then it would seem that swing weight can be directly calculated from those measurements. So does this mean that two racquets with exactly the same measured weights and measured balances can have different swing weights? 🤔 People mentioning mass distribution as another factor, but if mass distribution is different for two racquets with same measured weight, then the balance point will change, correct?

[@zapoi67]

@@Better_Call_Raul 1) correct 2) it may change or not, depending how the distribution has been modified

[@PrecisionPointTennis]

Thanks

[@eddiepearce5307]

how the hell do you play with a racket with a 348 SW???????? what level? I am down to 4.0 and on hard courts I have trouble with a 320 SW racket. Clay only one thing but slick hard courts I do not find it possible to play with high SW. I do have a 1 handed backhand

[@Ladran_Sancho]

*affect

[@GrungePopRecords]

You’re awesome

[@ariurip3751]

You started to notice swingweight once you have two of the same racquet

[@WaltKurtz68]

I started noticing swingweight when I played with my Prince Thunderstick 110, that had been lying in the attic for 25 years. Then Harry measured one at 383 SW . Whhuuuuuuutttt???!!!!! That explained a lot !

[@yzerguy]

Harry can you reconcile the specs you like to play with (Frankenstein) with your video about the hardest racquets to play with (kzbin.info/www/bejne/d6iYhGSHhd11pKc)? I agree with you in that vid that most of us aren't Roger/Joker etc. and shouldn't be playing with heavy racquets, you seemed to include yourself in the non-Roger group. But here your Frankenstein weighs a ton and swings "like a wrecking ball". Are you back in the ATP camp?

[@WaltKurtz68]

I always thought that weight added to the grip didn't add swingweight. Especially when it's added before the pivot point of the SW machine.

[@gilesports97]

Unfortunately this guy knows very little about customizing rackets and what he thinks he knows is inaccurate.

[@garramiro]

and you are absolutely right

[@WaltKurtz68]

@@gilesports97 Glad to hear that. I was almost starting to doubt myself, after what he says at 19m50. He points at the buttcap and says that when you add weight there, you increase the swing weight. That cant be right, can it? 🤔

[@enematwatson1357]

That's incorrect. Mass added at the handle end will cause minimal SW increase whereas the same mass added near the tip of the racquet will significantly increase it but any additional mass anywhere can only increase SW.

[@WaltKurtz68]

@@enematwatson1357 So basically that's about 99% of what I said. Just Instead of no sw increase it's minimal sw increase.

[@pepijnhuvenaars]

Isn't swingweight simply a result of the weight and the balance?

[@enematwatson1357]

No, or not quite. Swingweight is sensitive to where the masses are located in a way that balance is not. Frames with identical weight and balance can still have different swingweights depending on how centralised (close to the balance point) vs polarised (towards the extremities) the masses are. Swingweight depends on the square of the distance from the pivot point whereas balance is just distance.

[@juju-rt8ek]

No comments?

[@chuckfriebe843]

Head also makes a 10 gram buttcap. You can order them from Tennis Warehouse

[@bsinghgill]

348g swing weight, Harry are you mad? I’m surprised that you’re shoulder or or elbow doesn’t kill after playing with that kind of swing weight. I have two VCore Pro 97D, with a 5g variance and I can feel the difference, favouring the lighter swing weighted stick. You’re right, I do get more spin but, lack a little plow compared to the heavier version.

[@HiredGunz98]

Best tennis strings: Gosen AK Pro CX (TS761)

[@BARBERSHOPP]

Why the best? Full bed? Or in a Hybrid? Cross or mains? What gauge? What tension? What racket are you using it in?

[@HiredGunz98]

@@BARBERSHOPP I go full , some players like it hybrid. I prefer just full. The depth of the shots and spin are amazing. Using it with Original Babolat Aeropro Drive and Wilson K-Factor Kzen Team FX racquet.

[@tusharkantmalik]

tension?

[@HiredGunz98]

@@tusharkantmalik 55lbs

[@gtye0h]

How to reduce swing weight?

[@pimmelfresse9033]

Almost impossible.

[@jerome_morrow]

Shave the bumper.

[@gtye0h]

@@jerome_morrow if I'm Dan the man, I'm not haha

[@muchacho87]

i think you cannot remove swingweight without decrease static weight. but 100 procent sure

[@MrCarFanatic]

use thinner strings

[@андрейенютин-ы5ъ]

Swingweigh we know🤣🤣🤣what about twistweight ?

[@Desslok20]

බංකරය සහ ටැග්

[@chuckfriebe843]

Harry, you do not customize pro player racquets. Your method is so unbelievably unscientific. Stop lying and fooling yourself as well. Roman Prokes is getting a laugh outta you right now.

[@vwmusicplaylist1935]

346g is just too heavy.

[@TimTheMusicMan]

Someone please teach poor Harry how to hit a proper forehand and backhand.

[@eduardohuerta5460]

It doesn't matter if you have poor footwork.

[@tberry79]

@@eduardohuerta5460 Savage.