Traxxas TRX-4 Brass Bumper Mount and 25T Aluminium Servo Arm - TRX431FX25TS by GPM  [TRX431FX25TS]

Front-end bumper mount and 25T servo arm for TRX-4

This aftermarket kit is a scale front bumper mount and steering assembly designed for Traxxas TRX-4 crawlers. It combines a brass bumper block with a 25T aluminium servo arm and a spring steel steering link to supply front-end mass and improved steering control while preserving the stock chassis layout.

The brass mount adds stability and measurable nose mass to help balance the axle, the 25T arm gives a straight-arm dual-hole setup for tie-rod length changes, and the spring steel link raises durability under repeated loads. The package includes a full complement of fasteners to replace or upgrade the factory screws during installation.

Targeted at scale trail use and adjustment work, the assembly allows the servo to move slightly forward to alter front centre of gravity and provides a quick way to trial nose weight (approx. 200g reported use) and tie-rod geometry tweaks without cutting or welding. This is an RC accessory only and is not for real vehicle use.

For TRX-4 builders wanting a compact, reversible way to shift axle balance and sharpen steering feel, this GPM mount and horn kit is a straightforward upgrade; always verify screw lengths and steering arc before trail runs.