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

Rear alloy knuckle arm for HPI Baja buggies

This alloy rear knuckle arm serves as an RC-scale replacement for HPI Baja buggies, listed under model BJ022. The machined aluminium construction replaces the original knuckle to give a firmer mounting surface for the rear hub and suspension link attachments.

Practically, the knuckle changes how loads move through the rear suspension during acceleration, braking and cornering. Fitting an alloy arm reduces flex at anchor points so toe and camber remain steadier under load, which helps when tuning suspension settings.

Installation is familiar for hobbyists: lift off the stock knuckle, transfer any compatible bearings or inserts, then secure the new alloy arm to the hub and steering link with the existing fasteners. Check clearance and confirm unrestricted wheel spin and suspension articulation before full use. This item is an upgrade for setup and maintenance rather than a geometry modification.

Use this alloy knuckle arm to tighten rear mounting points and achieve more repeatable suspension behaviour when testing and tuning HPI Baja cars.