I'm running Continental 305/25ZR/20's on the rear of 04 Z. I had a leak from a nail and didn't realize it until the side wall up! There isn't much side wall on that size tire-believe me. Anyhow I was out in the cuts (Modesto, Ca) and I couldn't get that tire, so I bought a used one (I got screwed but they new they had me, by the balls) it's 255/35/20, will running this different size,for a few hundred miles damage my rear-end? Back in the day it would damage the spider gears in a real posi unit (not limited slip) so I need a good fellow vette freak to help me out. MySicZ06 P.S Buyers beware of West Coast Corvette rear ends!!!!