B.S.A. wheel mold numbers 2, 8, 12 and 15 produce wheels with superior speed characteristics. Wheels from these molds number are typically defect free, more round, and have a smaller wheel bore size. These wheels are untouched. They have not been sanded, lathed or modified. They are ready for you to prepare according to your own local pinewood derby regulations. These wheels are perfect for Trueing with Derby Worx tools and provide exellent performance.