This Corally pinion gear is sized for 48 pitch gear systems and features 19 teeth with a 3.14mm shaft diameter bore. A set screw on the hub locks the pinion securely onto the motor shaft. It is a metal pinion intended as a factory replacement for Corally vehicles using this pitch and bore combination. Features: 48 pitch 19 tooth count 3.14mm shaft diameter bore Set screw hub retention 7/7/26 cs