HPI Baja Alloy Rear Knuckle Arm by GPM BJ022  [BJ022]

Alloy Rear Knuckle Arm for HPI Baja

This alloy rear knuckle arm is an RC-scale replacement part intended for HPI Baja buggies, offered by GPM as model BJ022. It replaces the standard rear knuckle arm with a machined aluminum component to provide increased rigidity and a consistent mounting surface for the rear hub and suspension links.

In practical terms the part affects how loads transfer through the rear suspension during acceleration, braking and cornering. Hobbyists use an alloy knuckle arm to reduce flex at the mounting points, helping maintain repeatable toe and camber behavior under load and making suspension tuning responses more predictable.

Installation is straightforward for experienced builders: remove the stock knuckle arm, transfer any bearings or inserts that fit, and secure the new alloy arm to the hub and steering components using the existing hardware. Check fitment for interfering contact and verify free wheel spin and suspension travel before full operation. This replacement part is an upgrade option for maintenance and setup tuning rather than a change to fundamental geometry.

Choose this alloy rear knuckle arm when you want stiffer mounting points and more consistent rear suspension behavior for setup work and routine maintenance on HPI Baja buggies.