I have a set of 1 inch billet aluminium spacers from Stockton Wheel (they make, or did make, the same thing as an adaptor from small to large bolt pattern as well). I assume you are taking about this kind of set up. These spacers are bolt on, meaning they bolt onto the wheel lugs and the wheel in turn bolts onto lugs in the spacer itself. To me, this kind of set up would be almost if not equally as safe and strong as a direct wheel to hub bolt on. I may be wrong and would like to know the science of it all if someone can impart that.
