TRAXXAS TRX4 Brass outer portal drive housing (front or rear) heavy Edition by GPM TRX4021X  [TRX4021X]

Heavy brass portal housings for TRX4

This GPM heavy edition brass outer portal drive housing is an RC-scale upgrade designed for the TRAXXAS TRX4 platform. Machined in brass to add rotating mass, each housing increases wheel weight by approximately 50 grams to help stabilise wheel contact during slow-speed crawling and to improve the effective crawling angle when negotiating low-lying terrain.

The units are intended for use on either the front or rear portals and are presented as a matched set for axle balance. The added weight helps wheels maintain ground bite when a tyre becomes buried in a rut or soft section, allowing the model to regain traction and return to a neutral stance more smoothly.

Hardware for mounting is provided, including stainless steel flat head screws specified as 2.5x8, 16 pcs. The design focuses on a simple bolt-on replacement of the stock outer portal housings with no modification to the core driveline assumed; installation follows standard portal housing removal and reassembly procedures for the TRX4 platform.

For TRX4 owners seeking a straightforward way to add rotating mass and improve low-speed crawl performance, this brass outer portal housing set provides a direct replacement that emphasizes stability and ground engagement without altering core drivetrain components.