Rolling the lip really doesn't help on 2nd gens you will have more of an issue rubbing the outer wheel house than rubbing the lip. Ride height will have an effect on what you can get away with, also what tire brand you use. I know they should be the same no matter what brand you use but Michelins tend to be a little narrower than say Nittos. I have 2 cars with 275/40 -18's on the rear the Nittos are very tight w/ 18x8 4.75 bs and the Michelins are not. The car has been lowered 3" so it limits the front size 18x7 4.5 bs. w/235-40. I have no rubbing on the front a very slight rub in the rear under hard compression of the springs but not enough to damage the tire.
