TRAXXAS TRX4 Front Bumper Mount & 25T Aluminium Servo Horn Technical Upgrade TRX4331FX25T by GPM  [TRX4331FX25T]

TRAXXAS TRX4 TRAIL CRAWLER Brass Front Bumper Mount+25T Aluminum Servo Horn - 19pc set - GPM TRX4331FX25T
Price:
USD$31.90
Brand:
GPM
Model:
TRX4331FX25T
GTIN:
4894538306590
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Precision brass bumper mount and 25T aluminium servo horn assembly

This 19 piece upgrade set is engineered for the TRAXXAS TRX4 TRAIL CRAWLER chassis, combining a CNC-friendly brass front bumper mount with a 25T aluminium servo horn to deliver improved front-end anchoring and more repeatable servo output under load.

The construction is specified in the product title: a brass mount provides added inertia and a rigid mounting surface at the bumper area, while the 25T aluminium horn supplies a metal-to-metal spline interface at the servo output. Components are intended to interface with the TRX4 front assembly and compatible servos using the TRX4 spline standard.

Installation and setup recommendations: the brass mount establishes a low-compliance mounting point compared with common plastic alternatives, and the aluminium 25T horn reduces flex at the servo output to tighten steering feedback. Validate spline compatibility and clearance before final torqueing to ensure full range of motion and avoid mechanical interference.

Specifications

  • Item: Front bumper mount and 25T servo horn set
  • Material: Brass mount, Aluminum 25T servo horn
  • Model Number: GPM TRX4331FX25T
  • Compatibility: TRAXXAS TRX4 TRAIL CRAWLER
  • Quantity: 19 pcs

A technically focused metal upgrade for TRX4 platforms that increases front-end rigidity and reduces servo horn compliance for tighter steering control.

This item is compatible with

  • TRAXXAS TRX4 Defender Trail Crawler

What spline count does the horn use?

The horn is a 25T spline design; confirm your servo uses a 25T spline or fit an appropriate adapter before installation.

Any torque recommendations for fasteners?

Tighten fasteners to a firm hand torque and recheck after initial runs. Use thread locker on high-vibration installations but avoid over-torquing aluminium screw bosses.

Will this affect steering geometry calibration?

Changing horn radius or position will alter lever arm and effective steering ratio; after fitment, recentre the servo and verify end stops and link lengths to maintain desired geometry.

Is additional reinforcement required for heavy servos?

High-torque servos can transmit greater loads; check mount fasteners and surrounding structure for adequate strength and consider backing plates if you observe deformation under load.