TRAXXAS Rustler VXL Precision Alloy Rear Upper Arm RUS057 by GPM  [RUS057]

Precision alloy rear upper arm for improved rear link stability

This alloy rear upper arm is an aftermarket replacement engineered by GPM and designated RUS057 for the TRAXXAS 1/10 Rustler VXL chassis. It is produced to serve as a direct-fit rear upper link, restoring or upgrading the suspension pickup points to maintain accurate alignment under load.

Installation follows the Rustler VXL rear chassis mounting geometry and typically reuses the original pivot hardware. During assembly verify ball stud and pin alignment and confirm there is no interference with the shock towers or rear hub to ensure correct articulation and service life.

From a setup and tuning perspective the rear upper arm affects roll centre and rear toe during compression and rebound cycles. The alloy construction reduces flex at the pickup, delivering more consistent rear geometry and repeatable handling during aggressive cornering or high speed operation. When adjusting other link lengths or shock parameters, proceed in small increments to preserve predictable balance.

A precision upgrade intended for serious hobbyists seeking improved suspension consistency and reduced pickup compliance under demanding conditions.