RC Cars & Trucks On Road & Off Road RC Vehicles RC Visions Amazon.com: Traxxas Rustler 4x4 Ultimate VXL Blue 1 10 RTR 67097 4 Traxxas X Maxx Ultimate RC Monster Truck Traxxas X Maxx 1 5 4WD Brushless RTR Monster Truck with TSM, GREEN Traxxas Rc Truck Bodies 5 Best Cars And To Buy Of 2025 Upgrading your X Maxx! Six upgrades to your X Maxx Monster Truck. 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 lasting performance. This is replacement hardware for use on Traxxas vehicles; consult your user's manual for exact parts listings.