Hey Tukn20s, where are you getting them Boyds from? I got Boyd Smoothies, 17x7 front, 18x8 rear (not Smoothie IIs, however) from Moss, and the backspace is printed on the box. 6.125 for 18x8s, I think. There is a way to calculate offset from backspace. Unfortunately, I threw out the box for my 17x7s. Sorry. But try calling around, maybe Boyd Coddington or wherever you are getting the wheels from, perhaps they can look it up for you. I don't know how much different the Smoothies are from the Smoothie IIs, probably not much. The guys at BC told me the Smoothies were made for the PT, so there shouldn't be any problem with fit.
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