Going from Kevlar mains to gut mains

[Shroud]

Probably should have posted this here instead.

http://tt.tennis-warehouse.com/showthread.php?p=7977821#post7977821

I want to try gut mains. If the current kevlar is strung at 25lbs, what should I string the gut at to get a similar stiffness? Will be using poly crosses.

 

[Irvin]

Probably should have posted this here instead.

http://tt.tennis-warehouse.com/showthread.php?p=7977821#post7977821

I want to try gut mains. If the current kevlar is strung at 25lbs, what should I string the gut at to get a similar stiffness? Will be using poly crosses.

You want the Kevlar feel? Why not save your money and stick with the Kevlar? Not sure you're going to able to make the gut play like Kevlar.

 

[newpball]

If the current kevlar is strung at 25lbs, what should I string the gut at to get a similar stiffness?

You won't.

Kevlar and gut are actually opposites.

You won't 'make' Kevlar less stiff by stringing it looser. The only difference will be that the 'shock' comes a little later.

Unless you want to ruin your arm I would stay 100% away from Kevlar.

 

[Shroud]

I know gut and kev are on the opposite end of the stiffness charts.

Let me ask this another way.

I want to try some gut mains with poly crosses. I think the poly will add some stiffness.

I have been using the kevlar with all kind of strings including poly, and really like it. At the low tensions its pretty arm friendly.

I just need a string bed that is low powered and dont want to string up the gut and have the damn thing spraying shots and wasting money.

So I am guessing I need to go higher in tension, but how much? 10, 20lbs??

 

[esgee48]

I would start with the stiffness and tension retention ratings for the Kevlar and the NG string you're planning to use. They're just guides, but I would think the NG has to be greater than 2X your Kevlar tension. This will play havoc with the frame unless you also up the tension of the poly cross.

Is there any way for you to determine the SBS or DT of your current string combo? If you can do this, then that's the target you're aiming for with NG and poly. 2 cents.

 

[Shroud]

Great idea.

I do have the gamma string meter thingy. And I have racket tune but it never seems to work for me. Probably because I deaden the heck out of the frame.

Will the gamma be useful? i get a reading of 28 STI

 

[esgee48]

I do not know what the Gamma stringmeter measures. I do not believe that it is DT or SBS. RacquetTune does measure tension, and perhaps Version 5.0 does SBS. Perhaps a query to Stoneage about using his SW to match SBS or DT. Other than that, maybe a combined STI or about 28-30?

Addendum: There is a version 5.0 released 12/13/13 according to the app store.

 

[Irvin]

RacquetTune will measure DT or tension.

 

[Shroud]

According to racket tune, the stiffness is 22.1 and the tension is 40.1lbs.

So am I right in thinking that I need to string the gut in the 40s or less factoring in the poly to get a similar stiffness?

 

[HunterST]

You won't.

Kevlar and gut are actually opposites.

You won't 'make' Kevlar less stiff by stringing it looser. The only difference will be that the 'shock' comes a little later.

Unless you want to ruin your arm I would stay 100% away from Kevlar.

Personally, I don't find Kevlar to be hard on the arm at all. I hybrid it with synth gut crosses and I find it works great. I can swing freer than I can with polyester.

 

[esgee48]

Let's examine your RT DT of 22.1 and tension of 40.1#. Look at your signature. If you're pulling 25#, how can you measure 40#? Your string factors are way off. When those are right, you should have a tension of < 25# and a DT of whatever it is.

My original suggestion was for you to replicate the DT, not the tension. To do that, I think you will need to string a few mains at 1.5X-2X kevlar and maybe also do a few crosses (6 or 8 each) centrally and measure. Repeat until your DT is close. Don't do it too many times or you'll damage the gut. 2 cents.

 

[Shroud]

Let's examine your RT DT of 22.1 and tension of 40.1#. Look at your signature. If you're pulling 25#, how can you measure 40#? Your string factors are way off. When those are right, you should have a tension of < 25# and a DT of whatever it is.

My original suggestion was for you to replicate the DT, not the tension. To do that, I think you will need to string a few mains at 1.5X-2X kevlar and maybe also do a few crosses (6 or 8 each) centrally and measure. Repeat until your DT is close. Don't do it too many times or you'll damage the gut. 2 cents.

Thanks. I saw that and wondered how it could be higher. It does FEEL more like 40lbs

Truth is i hate rackettune. Its just not a well done app and is confusing (that same shade of green for selecting metric NEVER looks right to me because the color is so close and wrong what is selected should be clear- ETC). If you can point to where I can put in my "string factors" that would be great. I looked through the guide and did what I saw but there is nothing I can see that are "string factors". I changed to an 85 from a 93 and after beating the crap out of my stringbed it got a reading in the 40s.

I think though that Racket tune wont work properly because I have dampened the frame so much.

Anyhow if I have it right you are suggesting tensions between 37-50lbs right. Thanks for trying to help

 

[esgee48]

http://www.appmaker.se/?m=4&s=4

There's a short description on how to measure and record string factor using the link above. Heading is "How To Measure String Factor"