This Robinson Racing Products pinion gear features 15 teeth and is sized for 32 pitch (0.8 mod) gear systems with a 5mm bore for motor shaft fitment. It is made from extra hard blackened steel for increased durability and wear resistance compared to standard pinions. A set screw is included for securing the gear to the motor shaft. This is a direct factory replacement pinion for builds running 32 pitch drivetrain setups. Features: Extra hard blackened steel construction 15 tooth, 32 pitch (0.8 mod) 5mm bore for motor shaft Includes set screw 7/7/26 cs