Optional spur gear for 3-Pad Slipper Clutch. Precision-molded slipper clutch spur gear 87T 48P is manufactured out of XRAY's exclusive secret combination of composite item, allowing kit to be robust enough to handle superior brushless machines. The spur gear was designed to genuinely have the cheapest possible fat while staying strong and light. Each gear has a stamped enamel quantity for easy recognition.