Optional spur gear for 3-Pad Slipper Clutch. Precision-molded slipper clutch spur gear 87T 48P is made from XRAY's exclusive secret mixture of composite material, allowing the apparatus to be robust enough to take care of high-performance brushless motors. The spur gear is designed to have the best feasible fat while remaining strong and light. Each gear has a stamped enamel number for simple recognition.