TRAXXAS 1/10 Rustler VXL Aluminum Rear Knuckle Arm by GPM RUS4022  [RUS4022]

Aluminum rear knuckle arm for Rustler VXL

This GPM RUS4022 set supplies two aluminum rear knuckle arms designed for TRAXXAS 1/10 Rustler VXL setups, intended as a durable replacement for plastic originals. The parts use 6061 T6 aluminum to provide higher tensile strength while keeping weight reasonable, and Delrin collars are fitted to tighten the interface and reduce side play at the hub area.

The machined bearing seats align the wheel joint with minimal gap, so the rear wheel rotates more consistently under load. Functionally, the knuckle arms stabilise the upper and rear lower arms and the rear axle connection, which helps maintain predictable rear track behaviour during acceleration and cornering.

Installation is a direct swap for the stock rear knuckle arms on compatible Rustler VXL layouts, checking bearing fit and collar seating during reassembly to preserve alignment. For tuning, lighter or heavier arms change rotational inertia and slightly affect handling feel, so verify clearance and hardware tightness after fitting.

If you need a metal upgrade for the Rustler VXL rear hub area, this pair offers improved fit and durability while keeping installation straightforward.