Paul, lots to think about with wheels, they are not just round bits of Ali with holes in, lot more complicated than that !. First, if you are going to use peg drives DO NOT use bolt on adapters, use a correctly made spindle. You need to know and design your wheels not only for clearance on your brakes, but also to allow for the correct positioning of the steering arm to get the Ackerman correct ( which will affect the position of the brakes disc et al. ) and of course to make sure that the KPI is correctly set in relation to the wheel , or vise versa . The whole package needs to be designed to be compatable both with its mechanical parts and also it's geometry. If you are going to make / have made the spindles, a lot of attention needs to be given to material specification, all of wheel seating angles, and of course the external retaining spinner or nut, which should always be mechanically locked either by wire or pin. Also remember that bigger is not always better, Carlos Fandango wheels are for boy street racers and possuers, not for drivers. Think hard !