Hot Racing light weight 48T steel spur gear for the Traxxas 1/16 E-Revo, 1/16 Slash 4X4, 1/16 Summit, and other Traxxas 1/16 vehicles. Features: CNC machined light weight hardened steel construction Replaces stock nylon gear Direct replacement for the original and requires no additional parts to install Purple colored ring pressed on gear with tooth count laser etched