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

Alloy rear knuckle for HPI Baja tuning

This machined alloy rear knuckle arm is a replacement part intended for HPI Baja buggies, carrying the model number BJ022. The alloy unit replaces the stock knuckle to give a stronger, more consistent mount for the rear hub and suspension link points.

The part influences how loads are transferred through the rear suspension during acceleration, braking and cornering. Many hobbyists fit an alloy knuckle to cut down flex at mount points, which helps keep toe and camber consistent and makes suspension adjustments more reliably repeatable.

Installation is simple for competent builders: remove the original knuckle, move over any bearings or bushings that match, and fit the alloy arm to the hub and link mounts using existing screws. Verify there is no binding, confirm free wheel rotation and suspension travel, then proceed to setup. This is intended as an upgrade for maintenance and tuning rather than a geometry change.

Choose this alloy rear knuckle if you want firmer rear mounts and steadier suspension feedback during setup and everyday use on HPI Baja machines.