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Old 05-08-2012, 01:23 AM   #1
westicles3
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Default Tire stretching question

Hows performance?

So just got some new 225/40-17 nittos that will be going on 17x9 grids (got a killer deal). I've seen how it looks and the little bit of stretch there is isn't too bad looking. I'm more into performance than looks however and can't find much on how this might affect handling or wear patterns. Any input would be awesome. Thanks!
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Old 05-08-2012, 03:01 AM   #2
RoadKillDMD
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'Stretching' a skinnier tire on a larger wheel is unnecessary and will decrease your performance. Grip, breaking distance, added unsprung/rotational weight, the works. If you're going for looks, great! Take this thread to Tire and Wheel in Technical. You're not going to get any positive advice from very many people around here. My advice, sell that skinny rubber, get tires that actually fit.
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Old 05-08-2012, 08:50 AM   #3
jayman4312
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why would you not buy tires that fit your rims properly?

It sounds like you already bought the tires and are going to install them no matter what anyone here says. we could tell you until we are blue in the face how it will negatively impact performance, blah blah and you would still do it so.....
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Old 05-08-2012, 10:56 AM   #4
brew02wrx
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225s fit well on a 7.5-8in wheel, for a 9in wheel you wanna look at 255's

stretching tires decreases traction and cornering ability because you're taking away the sidewall and since the tire isnt square on the wheel the contact patch is smaller and you'll probably wear through the tires quicker, its just dumb

Last edited by brew02wrx; 05-08-2012 at 12:13 PM.
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Old 05-08-2012, 11:21 AM   #5
dangerousatom
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Agree with all^^

You need a 245 at the least a 255 will be a flat/flush fit or a 265 with a bulge
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Old 05-08-2012, 11:30 AM   #6
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The stretch is supposed to give a stiffer sidewall, that's really the only pro, most people are stretching to fit wide/low offset wheels, not for performance.
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Old 05-08-2012, 12:05 PM   #7
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You will be much happier with wheels and tires that are the proper size for each other. If you care about performance your going to be losing it if this is your setup you are gioing to run. In the end is your car do what you want.
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Old 05-08-2012, 01:59 PM   #8
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With what most people are saying here, A stretched tire will give you less performance attributes over a tire that would fit that wheel properly such as a 245-255.
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Old 05-08-2012, 05:23 PM   #9
Gallo2011
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Quote:
Originally Posted by RoadKillDMD View Post
'Stretching' a skinnier tire on a larger wheel is unnecessary and will decrease your performance. Grip, breaking distance, added unsprung/rotational weight, the works. If you're going for looks, great! Take this thread to Tire and Wheel in Technical. You're not going to get any positive advice from very many people around here. My advice, sell that skinny rubber, get tires that actually fit.
Ok, I agree with most of this. I'm curious how a 225 width tire on a 17x9 wheel will add unsprung/rotational weight, compared to say, a 255 width tire on a 17x9 wheel. Assuming 225/40/17 compared to a 255/35/17, so as to keep the overall diameter close between the two. I can't imagine the 225 tire weighs much more, if any, than the 255 tire.
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Old 05-08-2012, 05:31 PM   #10
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Quote:
Originally Posted by Gallo2011 View Post
Ok, I agree with most of this. I'm curious how a 225 width tire on a 17x9 wheel will add unsprung/rotational weight, compared to say, a 255 width tire on a 17x9 wheel. Assuming 225/40/17 compared to a 255/35/17, so as to keep the overall diameter close between the two. I can't imagine the 225 tire weighs much more, if any, than the 255 tire.
The comparison isn't between a 225 on a 9" wheel and a 255 on the same wheel, the comparison is between a 225 on a 9" wheel and a 225 on a 7.5" wheel.

In other words, if you're going with a 225, choosing a wheel that's the right width will reduce weight and increase performance versus choosing a wheel that's too wide.
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Old 05-08-2012, 05:50 PM   #11
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Yeah, I read RoadKill's post again and noticed he mentioned a larger wheel with the 225. A 225 tire on a 7.5" wheel will definitely weight less than a 225 on a 9" wheel.

OP, it sounds like you want the best of both worlds, so to speak. Good looks and performance. I think a 255 tire on a 17x9 wheel would look pretty mean. You'd definitely gain the performance you're looking for too. Check out the Top Scoob on the home page for what I'm talking about. His is extreme, but it looks good and performs even better.
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Old 05-09-2012, 02:17 AM   #12
westicles3
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Thanks for the input guys. Think I'll end up selling the tires and get the proper fit. Anyone interested in some new nitto invos?? Lol
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Old 05-09-2012, 03:55 AM   #13
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lol @ a "little" stretch on a 17x9 wheel....
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Old 05-09-2012, 09:11 AM   #14
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Quote:
Originally Posted by brew02wrx View Post
225s fit well on a 7.5-8in wheel, for a 9in wheel you wanna look at 255's

stretching tires decreases traction and cornering ability because you're taking away the sidewall and since the tire isnt square on the wheel the contact patch is smaller and you'll probably wear through the tires quicker, its just dumb
Tire Stretch has nothing to do with tire wear. At all. Not one bit.
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Old 05-09-2012, 09:33 AM   #15
jayman4312
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Originally Posted by vision.dynamix View Post
Tire Stretch has nothing to do with tire wear. At all. Not one bit.
This. its when you start going super crazy awesome hella flush and toein/adjust camber all crazy and ride around daily like that. Thats when you go through tires everyday due to awful uneven wear.
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Old 05-09-2012, 09:37 AM   #16
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Quote:
Originally Posted by jayman4312 View Post
This. its when you start going super crazy awesome hella flush and toein/adjust camber all crazy and ride around daily like that. Thats when you go through tires everyday due to awful uneven wear.
I was slammed, tucking 255s with 4* of camber, and I had no abnormal tire wear. The key is 0 toe.
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Old 05-09-2012, 12:20 PM   #17
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Quote:
Originally Posted by vision.dynamix View Post
I was slammed, tucking 255s with 4* of camber, and I had no abnormal tire wear. The key is 0 toe.
But you keep wheels as long as I keep guitars. Maybe a month max.


Don't sell the tires, they're fine. Sell those stupid wheels and get some that are proper and will fit. 17x8 would be nice and even 17x7 1/2 would go well with 225's.
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