Will these fit?!

[headlikeahole]

Originally Posted by AlexWood

Yes they will work fairly well with the 215's. Yes they will be stretched but not to the point where they are un-drivable. Just make sure they are installed by a reputable shop that knows what they are doing. Seeing as you only have springs, I wouldn't go much over a 235 as you may run Into rubbing issues. If you are looking for the stretched look, then a 225 will work just fine.

Any reputable shop that knows what they are doing would tell him he's an idiot for wanting 215 on a 9 inch wheel.

[Kwise1]

215mm is 8.4 inches wide and with a 45 sidewall it will stretch just fine. I ran 225/35 on a 9.5 all around with no issues and currently have 245/35 on 10.5's.

[Brndn704]

Originally Posted by mav1178

So tell me, assuming one is NOT going for the look nor trying to fit aggressive wheels onto stock fendered cars, how is a stretched setup good?

Here's why I think it's bad, ignoring OP's question:

1) stretched tires deform sidewall beyond design characteristics
2) any imperfections or defects in sidewall construction will be exaggerated by stretching tires
3) wheels may have more potential for curb damage, but this is driver-dependent.
4) if stock tires, using it beyond the design characteristics of the tire will impact tire warranty and any normal damage claims that may arise from a tire defect.

Again, let's ignore the slammed/wide wheel/stance argument, and assume stock tires on a stock-height FRS/BRZ with 9" wide wheels as OP is asking about. Please tell me how #1 #2 and #4 are addressed.

-alex

L.O.L

1.) no
2.) what kinda shitty tires you buying?
3.) lmao, just no. learn to drive.
4.) pay to play

[tyrantcf]

well, that escalated quickly.

[mav1178]

Originally Posted by Brndn704

1.) no
2.) what kinda shitty tires you buying?
3.) lmao, just no. learn to drive.
4.) pay to play

So is "no" your default answer? Or do you have an answer to my questions other than "no"?

[Tcoat]

Originally Posted by tyrantcf

well, that escalated quickly.

The problem I would have is that there is no way I could ever effectively argue with Brndn just because of his damned Avatar pic!
Know it isn't him but still...
Might be a good study for some psych student "The Perceptional Impact and Influences of Avatars Displayed Within Automotive Enthusiast Forum User Profiles "

[Bergen23]

Originally Posted by mav1178

So is "no" your default answer? Or do you have an answer to my questions other than "no"?

He obviously knows more than you.

/sarcasm

[aLaFleur]

I ran my stock tires on a 17x9 for months and had absolutely zero problems. You're golden, man. Hope it all works out for you.

[TheVoiceOfReason]

Originally Posted by mav1178

So is "no" your default answer? Or do you have an answer to my questions other than "no"?

I agree with you. #1 is obviously true. Anyone suggesting otherwise is trying to find further justification for themselves that tire stretching is the best, or just arguing. People get defensive and angry when they hear that their "agressive" look would actually make them slower or isn't optimal. Same with people insisting dropping their car to the ground on cheap coilovers increased their performance because they feel less body roll. For looks its fine to a point (I don't like it, but if someone wants to do it I dont care), but you really can't say that the tires were intended to be that way, or perform at their best that way.

[mav1178]

Let me be clear: if you want to stretch tires and you know what you are getting into, you're fine. If you know what the risks are, you're fine.

But for the OP and any other armchair mechanic out there that doesn't know what the downside of stretching tires are, you should ask and answer the 3 or 4 questions I brought up.

Stretching tires does exactly that: stretch the sidewall to mount a tire on a wider wheel. But anyone who has seen enough tires in their lifetime will know that, much like any other mass-produced good, tires can be prone to factory defect or failure.

Again: the factory tires have a warranty on them via Michellin. If you don't care about warranty and are paying for all repairs to the car out of pocket, ignore all my posts in this thread. If you are being cheap by using stock tires until you get newer tires later, you should reconsider your priorities when it comes to car mods.

-alex

[AlexWood]

Originally Posted by headlikeahole

Any reputable shop that knows what they are doing would tell him he's an idiot for wanting 215 on a 9 inch wheel.

By reputable, I meant a shop that has been known to work on aggressive wheel and tire setups and have the proper machines to do it. As far as "can it be done?", yes it most certainly can be done. Should it be done? That's for the OP to decide.

[Tcoat]

Ok, so as a guy that has no clue whether stretched tires are good or bad I thought I would do some research. Although there are a billion blog or forum opinions on the subject I could not find one solid authoritative article. The stance guys stand by it as fine, the race guys say it is dangerous and the shop guys say it is ok sometimes and not others.
I did find that a lot of shops will not do it for liability reasons so that is kind of telling.
I also found a pile of scary ass pictures of what can go wrong with them that alone would have me saying no way on earth!
So... if looking for support for their argument both sides can find all sorts on the good old interweb!

[Akari]

It's bad for traction, tire wear, and can lead to more serious problems but chances are you can get away with it. For short term it'll be fine, but you'll likely end up paying a couple extra hundred dollars to dismount, mount and balance twice. You might want to consider just selling your stock wheels and tires and picking up the correct size the first time.

I had my BRZ OEM tires stretched onto 17x8 wheels before I sold my STi and it really looked like garbage IMO. I can only imagine what them being stretched onto 17x9 would look like.

[wparsons]

Originally Posted by Kwise1

215mm is 8.4 inches wide and with a 45 sidewall it will stretch just fine. I ran 225/35 on a 9.5 all around with no issues and currently have 245/35 on 10.5's.

Except the Primacies are a very narrow 215. Both sets of snows I've had (205/50/17's - Barum Polaris 3 and now Hankook iPike RS) were noticeably wider than the stock tires. The tread width on the Primacies is 190mm.