This Kyosho factory replacement HD final pinion gear features 32 teeth and is made for the Optima platform. Constructed from steel for increased durability over standard pinion gears, it is a direct-fit internal gearbox component. This heavy-duty design is suited for drivers looking for a more robust replacement in the final drive assembly. Features: 32-tooth final pinion gear Steel construction for added durability Heavy-duty HD designation Direct factory replacement for Optima platform 7/7/26 cs