Many of you already know these are available from a west coast supplier, closer to home for those of us on the east coast is Go karts R us in Geneva New York. These are advertised as a bolt right on for Promo (brand) cars but may fit others, or may require fabrication to fit (as demonstrated in Murray Eliminators post) your particular tin lizzy. these are high quality wheels and are worth the price and effort to make them fit. For myself they are a must have, and I will do a step by step photo documentary of the (make them fit ) process. If your not 150 lbs anymore, or you want more engine options, and the engine you want is heavier then the stock 3 hp, this is the solution.