TRX-4 25T Aluminum Servo Horn with Spring TRX4025TA/2H by GPM  [TRX4025TA/2H]

25T aluminum servo horn for TRX-4 trail setups

This RC-scale 25T servo horn is made for Trail Crawler style TRX4 builds and provides a metal alternative to stock plastic arms. The integrated compression spring helps absorb sudden shocks to the steering linkage, reducing direct stress on the servo gear while retaining a direct spline fit for precise steering inputs.

The kit supplies the metal horn and matching hardware for a straightforward swap or light upgrade: the aluminum 25T spline horn, two stainless steel 3x12 round head screws, an aluminum collar, and a 3mm metal washer. Check your servo spline and shaft size to confirm fit before final installation.

Installation note for TRX-4: because the horn body includes a spring the arm is thicker than a standard plastic servo arm. When fitting in the stock servo location, reverse the support tie-rod orientation to keep clearance between the horn and nearby chassis parts. This adjustment preserves the front reverse steering gearbox position while avoiding interference on some stock layouts.