This Robinson Racing Products pinion gear features 39 teeth cut to 48 pitch and is finished with a hard nickel plating for added durability and corrosion resistance. The boss-style hub includes a set screw for secure mounting to the motor shaft. It is a direct factory replacement compatible with a wide range of Associated and other popular 1/10 and 1/8 scale platforms running 48 pitch gearing. Features: 48 pitch, 39 tooth count Hard nickel plated finish Boss hub with set screw included Robinson Racing factory replacement part 7/7/26 cs