I know...why 18"s you ask..well it just floats my boat and they are only $6 more per wheel then the 17"s. I have decited on the XXR 518 style wheels in white for my white spirit turbo 5 spd..My question is will they actually fit..I can get them in a 7" or 8.5 width...both 48mm offset..how do I find out if either of these fit before I order them? Thanks and no flaming please..