With my 295/30's on back, my siz will actually be a little smaller than stock, as far as rotation goes. Sidewall with stock is 89.25 vs 88.5 with the new tires. found that by taking 255x0.35 and 295x0.30.So I'll be going slower than my car says....LESS tickets for me.haha.But it really should be within 1mph so I'm not worried either way.