Optional spur gear for 3-Pad Slipper Clutch. Precision-molded slipper clutch spur gear 75T 48P is manufactured out of XRAY's exclusive secret mixture of composite product, permitting the gear become robust enough to take care of high-performance brushless engines. The spur gear was created to have the cheapest feasible weight while remaining strong and light. Each gear has a stamped tooth number for easy recognition.