TRX-4 Steering Servo Horn 25T Spring-Loaded - TRX4025TA/4H by GPM  [TRX4025TA/4H]

25T Alloy Servo Horn with Integrated Spring for TRX-4

This 25T alloy servo horn is a scale steering upgrade optimised for TRX-4 trail rigs to improve directional control. It uses a stainless spring to cushion impacts and reduce peak loads on the servo gears, while several tie rod positions let you dial in steering geometry without changing the servo output arm.

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

Fitment note for TRX-4 layouts: the internal spring increases the horn thickness and may reduce clearance in the stock servo location. If you use the original mounting spot, reverse the support tie rod angle to regain space and avoid contact while keeping the front reverse steering gear orientation. Always confirm spline engagement and link geometry before final tightening.

Tuning benefits: the built-in spring adds controlled compliance to absorb sudden loads and reduce gear shock, and the multiple mounting holes allow quick adjustments to toe and steering throw without modifying link lengths. This horn is useful when you want a more forgiving steering link for technical trail sessions and scale crawling.