![]() A lathed pinewood derby wheel from mold #4.īSA car wheels are pressed from 18 different molds, each with slightly different characteristics. Mold matching Closeup of pinewood derby wheel from mold #4. As always, know the rules of your organization before starting your work. This chapter covers selecting wheels, sanding, shaving or lathing the tread, coning the hubs, polishing the bores, balancing and, as a final touch, highlighting the spokes and raised letters. Stock wheels are 1.190 inch diameter and 0.415 inch wide with a 0.310 wide tread contact area. ![]() Since the wheels are the only moving parts, their quality has a significant effect on performance. Pinewood derby wheels are made by an injection molding process that leaves undesirable blemishes and imperfections in the parts.
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