Stock porsche 997 tires - will they fit?
 

Hey guys,

I'm not terribly knowledgable about tires and fitment on our cars (or any other car for that matter) and know that a lot of questions like this are asked everyday.

I have a chance to purchase a set of 235/35/19 and 295/30/19 re050A for $600.

I'm thinking it's a solid deal but don't know if these tire sizes actually fit our cars or if they'll cause any problems. I know our stock sizes have a higher sidewall on the front and the tires are wider (245/40/19). Will stretching the tire to get it on the rim have any negative results with handling, fitment, etc?

Thanks in advance.

Stretching will adversely affect everything...

But you REALLY aren't stretching much... So you should be ok. You're just going to have less sidewall (your speed will be a little off too)

The rears are slighlty undersized. the fronts are severely undersized. Your ABS/VDC and what not will be going crazy though. You could use the rears but I definitely would not use the fronts.

Don't do it. Not even considering the sidewall differences, the car will handle like crap with a 235/295 stagger. If anything the Z needs more front tire. The last thing you want to do is take that away while adding more to the rear.

Thats what I run, and have zero problems. Alot of cars, ie: the one they came off have no problems either. I got mine used for $200 V12's with right around 1k or less on them.

I can't imagine running that much stagger on this car.

The reason the Porsches pull them off so well is because of their weight distribution. They need that stagger for stability. The Z on the other hand is heavily front biased.

Again I have felt no differences in it. First hand experience. I can post current pics if needed.

Hell, I have 305's on mine rear, No issues to comment on. I had continentals on it before. They did grip better but that was mainly the tire compound difference. Watch eBay after a nice weekend and you can find good deals from rich guys that want fresh tires for their next track day..

Is your car daily or it is being tracked and/or autocrossed?

On another note, the shorter sidewall, plus a slightly more stretch fronts, will make for even bigger wheel gap and make it look a little weird

If you plan on "lowering" the car, i'd run and try that setup.

If NOT, i would look for a bigger front tire because it will look awkward with no drop.

/thread :)

You can't track or autox the V12s, at least not effectively anyway....

Are v12s no good for track? Even if they were properly fitting tires? That was going to be my next choice of tires since I'm poor (relatively). I'm hesitant to fork over the dough for PSSs

You will overheat them within laps, they grip marginally better than fuel economy tires. They are just average everything with a great price tag

^ What he said. If you drive your car at all spirited you should noticed some MAJOR understeer, which to me outweighs the fact that the car will also look funny with such a small profile up front. Yes that is a great deal, but for me it would definitely still not be worth it. Fork out the extra cash and get some proper sized tires (265/35/19f and 285/35/19r is supposed to be a excellent setup for our cars).

The wear of a summer tire with the grip of an all-season