ok so i just picked up a 2005 s4 avant and got a good deal on a set of sportec mono 10's. only thing is 2 are 19x8.5 and the other 2 and 19x10. right now the 10's have brand new 255/35-19's on them with a little bit of stretch. my question is would putting 245/35-19's on the 19x8.5 wheels not cause the center diff to wear. i figure because the 10" wide wheels have stretch it has already brought the sidewall down a little so going with the 245/35 should sit almost the same because there would be no stretch...right?

HELP...