Traxxas 3956 Spur Gear, 54-Tooth (0.8 Metric Pitch, Compatible With 32-Pitch)Spur gear, 54 tooth (0. 8 metric pitch, compatible with 32 pitch) Optional Traxxas spur gears allow you to increase or decrease the final drive ratio and tune for different applications. Smaller gears will increase the speed of the vehicle while larger gears will increase the torque. Use Traxxas stock and hop up replacement parts to get the most out of your Traxxas RTR vehicles. This product is made from high quality materials and designed for long