Optional spur gear for 3-Pad Slipper Clutch. Precision-molded slipper clutch spur gear 75T 48P is made from XRAY's exclusive key blend of composite material, permitting the gear to be robust enough to undertake high-performance brushless engines. The spur gear was created to have the cheapest feasible fat while remaining strong and light. Each gear has a stamped tooth quantity for effortless recognition.