TRAXXAS TRX4/TRX6 Rear Chassis Crossmember TRX4015RN by GPM  [TRX4015RN]

Rear Crossmember Upgrade

The TRX4015RN rear chassis crossmember is an aftermarket 7075 aluminium replacement created for TRAXXAS TRX4 and TRX6 scale trail crawlers. Precision machined from 7075 aluminium, the component provides a stiffer rear mounting point to help reduce chassis flex during large articulation.

Fitment details are shown below and the mounting hardware listed in the package lets you install the part using standard TRX4/TRX6 mounting points. The crossmember reinforces the frame rails and works with suspension links to keep the rear chassis more stable when crawling slowly over technical terrain.

Fitting needs basic hand tools and careful alignment with the stock mounting holes; retain or swap spacers as required. From a tuning perspective, the crossmember helps the chassis keep its geometry under load, which can make steering response and weight transfer more consistent when testing tyres and shock settings.

For builders wanting a low-profile, robust rear crossmember for TRX4/TRX6 crawling rigs, this 7075 aluminium replacement increases rear stiffness and includes the fasteners needed for direct fitment.