TAMIYA TB04 Front Knuckle Arm Aluminium Upgrade TB4021 by GPM  [TB4021]

TB04 Aluminium Front Knuckle Arm Overview

This aftermarket front knuckle arm is a direct-fit aluminium replacement for the TAMIYA TB04 chassis, supplied as 1 pr for 1/10 on-road RC use. It is intended as a robust steering component to support the steering linkage and wheel spindle area on the TB04 platform.

On the car the front knuckle locates the steering pivot and changes how steering geometry behaves during suspension travel. Swapping to an aluminium knuckle alters part stiffness and the interface with the spindle compared with the original, which can be useful when refining handling or testing setup changes.

Fitting is straightforward on TB04 assemblies that share the stock mounting points; always test-fit before final assembly to confirm free movement and sufficient clearance around the steering linkage and wheel hub. Sold as 1 pr (pcs).