TRAXXAS TRX4 Trail Crawler Aluminum 25T Servo Horn with Built-in Spring by GPM TRX4025TA/4H  [TRX4025TA/4H]

Aluminum 25T Servo Horn for TRX4

This 25T aluminum servo horn is a scale RC accessory designed to improve steering control on TRX4-based trail crawlers. It integrates a stainless spring to absorb shocks and protect the steering servo during impact events, while multiple tie rod holes let you fine-tune steering geometry without changing the servo output arm.

Included items from the kit are: servo horn (1 pc), stainless steel round head screw 3x12 (2 pcs), aluminum collar (1 pc), and 3mm metal washer (1 pc). These parts provide a ready swap for setups that match the TRX-4 servo spline and mounting dimensions.

Installation notes specific to TRX-4 platforms: the horn’s thicker profile (due to the internal spring) can reduce clearance when fitted in the stock servo location. If you install it in the original servo position, reverse the support tie rod angle to gain space; this adjustment prevents interference while keeping the front reverse steering gear position unchanged. Verify spline fit and tie rod geometry before final tightening.

How it helps tuning: the built-in spring adds a measure of compliance to absorb sudden loads, which can reduce gear shock, and the multiple positioning holes let you adjust toe and steering throw without additional link length changes. Use this horn when you need a more forgiving steering connection on technical trails or scale crawling runs.