Looking for a bigger diameter tire on my RR. Currently running 255/55/18. Don't necessarily want to go wide, so 55s is okay. Can I go to 255/75/18 without any rubbing of any body parts?
The rubbing my car experienced was on the rears when it was heavy loaded (due to some combination of tire width and height). The bump stops were designed to keep 255/55 tires clear of the fenders. And I have 60 series with a high suspension. I guess you could run into problems adding another 1cm to the sidewall height, choosing 70 series. 255/65 might work as well as mine, if you are lucky. I would encourage you to go 255/65, max, but it's your money.
hmm...I just have coil springs with no lift. I probably should go with just 60's max...Need to figure out how much the difference in diameter is between 60 and 70s..I have 255/70R/18 on 2" coil lift. There is a little rubbing when taking sharp turns. I like the right height and the rubbing does not matter to me since this is my weekend car and I just drive it occasionally.