This alloy rear upper arm is an aftermarket replacement part made by GPM and listed as RUS057 for the TRAXXAS 1/10 Rustler VXL. It is a direct-fit link meant to restore damaged components or upgrade the rear suspension pickup to tighter tolerances.
Fitment follows the Rustler VXL rear chassis points and normally uses the existing pivot hardware. Prior to first use, check ball studs, pivot pins and any potential contact with the shock tower or hub to ensure smooth articulation.
In setup terms the rear upper arm alters roll center and toe under load. Upgrading to a stiffer alloy item will limit flex at the mounting points, producing steadier rear geometry during aggressive cornering or higher speeds. When changing link lengths or shock settings, adjust gradually to retain balanced handling.
Ideal for drivers who want a dependable aftermarket rear arm that keeps suspension geometry stable during club runs or rough bashing.
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