The Traxxas 3961 68‑Tooth Spur Gear is a genuine OEM drivetrain component designed for use in a variety of Traxxas 1/10‑scale electric RC vehicles (such as E‑Maxx, E‑Revo, and Summit). This 68‑tooth spur gear with 0.8 metric (32‑pitch) spacing meshes with compatible pinion gears to transfer motor power to the drivetrain. Changing spur gears is a simple and effective way to tune your RC car’s gear ratio balancing acceleration and top speed for your preferred driving style and terrain.