Traxxas 3959 62-T Spur Gear (0.8 Metric Pitch, 32P) Optional Traxxas spur gears allow you to increase or decrease the final drive ratio and tune for different applications Compatible with 32-pitch or .8 Module pinion gears Tough nylon construction for high-power applications One gear per package Use Traxxas stock and hop-up replacement parts to get the most out of you Traxxas RTR vehicles This product is made from high quality materials and designed for lasting performance This is for use on RC vehicles, consult your user's manual for exact parts listings