The JR-TBB01-GU aluminum front knuckle arm is made for the Tamiya BB-01 (BBX) chassis as an aftermarket replacement and tuning component in a gun metal finish. It replaces stock plastic knuckles to improve stiffness and reduce flex under load while serving as the steering and suspension mounting point.
Installation notes: install the knuckle onto the original steering pivots and linkage points of the BB-01 (BBX). Reuse original fasteners when acceptable and verify steering geometry after fitting. Check wheel bearing seating and hub alignment during reassembly to ensure smooth free movement.
Tuning role: this aluminium knuckle provides a firmer steering pivot to help keep toe settings consistent and cut down on unpredictable deflection when cornering hard or running over uneven surfaces. Combine with matched uprights and linkages when refining steering throw and suspension behavior to achieve more repeatable handling.