I was looking at 7x15" wheels for my 88 90Q and was wondering what the offset should be. Simple math says go from the 45mm of the 6x14s to 33 in the 7x15s but the Coupe had a 37mm offset. Also, I've seen 35mm offsets spec'd in other places. I can't see any of it making much of a difference as I'm not lowering the car (and if I did, it'd be <=1"). The tires will be 205/55 P700Zs. BTDTs? Cheers!