Ok. So I have 9.5" in the rear. I asked this question before but never really got a good response. Once again, what is the tire size I should have on a 9.5 rim without risk/fear of rubbing. I know standard is 275 but some ppl go lower..i.e. 265, 255, 245. Currently rims have 225 tires on them, but they are stretched really bad. Am scared if I hit a pothole, the tire will blow up or damage the rims.

Another concern is my car is Quattro. Since I have 8.5 rims in front on 225 tires. And 9.5 on the rear, if I go with lets say 265 tires. Will that give me the risk of ruining my Haldex unit? Since there is a 10% difference in tire size from front to rear.

 

Yes, your tires need to be the same over all diameter to not ruin your haldex. Go to tirerack.com and check their fitment sizes. Should give you tire options.

 

Here is a couple pics of my old wheel and tire setup. Same width wheels as yours. 8.5 front 9.5 back, I ran 235/35 in the front, and265/30 out back. (you can see from the first pic there is little to no stretch

 

TYVM TurboTT920.