its not "a bit too aggressive"; it is straight "aggressive."
a clean fender roll can go undetected and there wont be any damage to the body. camber adjustment can be readjusted back to stock specs too.
that said, if you have stock 19s, your 255's will fit with a super baby stretch. without a fender roll, you will rub on dips. even on stock suspension.
if you have stock 18's, you're going to need new tires for the 19s. tires stretch sideways, not vertically.