HPI Baja Alloy Front Lower Arm by GPM BJ055  [BJ055]

Front Lower Arm for HPI Baja

This GPM BJ055 front lower arm is an RC-scale alloy replacement intended for HPI Baja chassis. It serves as a direct swap for worn or damaged front lower arms and is designed to integrate with the existing suspension mounting points on the HPI Baja platform.

In function, the front lower arm locates the wheel hub and defines roll center and camber behaviour under compression and rebound. Replacing a stock plastic arm with an alloy unit alters component stiffness and provides a stable mounting surface for ball joints and link points, which hobbyists use when tuning suspension response and durability for off-road running.

Installation is straightforward for someone familiar with basic chassis disassembly: remove the wheel and hub assembly, detach the old lower arm hardware, transfer or replace the linkage and pivot hardware as required, fit the GPM arm into the same mount points, and verify travel and alignment before running. After installation, check steering and suspension movement through full travel to ensure there is no binding and that geometry matches the vehicle setup.

For HPI Baja owners seeking a metal replacement for the front lower arm, the GPM BJ055 provides a straightforward alloy option to support suspension tuning and component longevity while retaining original mounting geometry.