The 255 fronts slightly rubbed on the lower part inside of the front facia on sharp turns which is why I went to 245's (slightly smaller overall diameter). The closest overall diameter to the 245's was the 285's which is why I put those on. The 255's profile also looked too "thick" when compared to the 285 rears which is also why I matched the up the 245 and 285's. I agree with BigTDogg in regard to matching the tires series is more important.