Engineered for Trail Crawler style TRX4 vehicles, this 25T aluminum servo horn offers a robust upgrade to reduce arm failure on rough terrain. The built-in spring is designed to absorb impacts transmitted through the steering link, helping to prevent abrupt loads from reaching the servo gears while keeping the original spline engagement.
The kit contains the core metal components for installation: the 25T aluminum spline horn, two stainless steel 3x12 round head screws, one aluminum collar and a 3mm metal washer. Hardware fits are intended for hobby servos with matching spline and shaft sizes; confirm compatibility before finalising the fit.
TRX-4 fitment advice: the spring makes the horn body thicker than many stock arms. When mounting in the original servo position, reverse the support tie-rod orientation to preserve clearance between the horn and nearby chassis pieces. This adjustment keeps the front reverse steering gearbox position unchanged while avoiding interference in some stock layouts.
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