This Schumacher Racing Products factory replacement pinion gear features an 18-tooth count at 48 pitch with a long boss design for secure motor shaft mounting. The long boss includes a set screw for positive retention on the motor shaft. Made from steel for durability, this pinion is designed for Schumacher 1:10 CAT platform vehicles. Features: 18 tooth, 48 pitch Long boss design for extended shaft grip Set screw retention Steel construction 7/7/26 cs