I just bought a set of Speedline challenge-style Highline wheels. I know these are fakes but they're quite attractive IMO. I'm curious how the fitment will be. They were just too cheap to pass up (because I want to upgrade to an 18 inch wheel). The offset is 52mm for both front and rear. Before I order spacers, I'm going to put tires on them and carefully measure how much spacer I will need to get the wheels as "flush" as possible. I saw a 456 at Monterey last year with HRE wheels that made the car look like a rollerskate - my stock wheels sit too far "inboard". Any idea what size tires suit this application best? I'm thinking 235-40-18 front and 275-40-18 rear. This should be an interesting winter project.