TRAXXAS TRX4 Trail Crawler 7075 Aluminum 25T Servo Horn by GPM TRX4025TC  [TRX4025TC]

7075 aluminum 25T servo horn

This is an aftermarket RC-scale servo horn produced for TRAXXAS TRX4 Trail Crawler platforms, supplied by GPM under model TRX4025TC. The arm is machined from 7075 aluminum and uses a straight-arm profile to reduce flex compared with stock plastic arms, and the 25T designation matches 25-tooth servo splines commonly used on scale crawlers.

Functionally it serves as a direct replacement part for steering setups, with dual mounting holes that let you alter tie-rod geometry for finer steering throw or increased mechanical advantage during tuning. The part is intended for hobby-grade RC use only and not for real vehicles.

Installation is straightforward: remove the original horn, confirm spline count and orientation, fit the aluminum horn to the servo spline, and secure with the supplied screws. Verify clearance and steering range before full use and recheck fasteners after initial runs.