This Core RC differential spur gear is a 48 pitch, 75 tooth design built around a 5mm center bore and a 16-ball differential configuration. Molded in blue plastic, it is a direct-fit replacement for Associated RC10 series buggies, trucks, short course trucks, and touring cars running 48dp drivetrain setups. The lightweight construction with weight-relief holes across the face helps reduce rotating mass in the differential assembly. Features: 48 pitch, 75 tooth spur gear 5mm center bore 16-ball differential compatible Blue molded plastic construction Weight-relief holes for reduced rotating mass 7/7/26 cs