Tamiya TB-04 Rear Knuckle Arm Aluminium TB4022 by GPM  [TB4022]

TB-04 aluminium rear knuckle arm overview

This aluminium rear knuckle arm is an RC-scale replacement part for the Tamiya TB04 platform, supplied as 1 pr. It replaces the standard plastic knuckle on TB-04 style touring car suspensions.

Material and function: constructed from aluminium to increase rigidity and resist wear compared with stock plastic components. The stiffer material helps maintain wheel alignment under repeated loads and supports more consistent rear-end behaviour during setup and track sessions.

Fitment and installation: designed to fit TB-04 series rear assemblies; confirm your variant uses the same knuckle geometry before ordering. Typical installation involves removing the hub, swapping bearings if required, and refitting with original fasteners. Ensure correct thread engagement and verify wheel bearing preload after assembly.

Tuning notes: aluminium knuckles can change steering feedback and rear traction due to higher stiffness. Make measured toe and camber adjustments and avoid over-tightening hex screws to prevent bearing binding.