Tamiya TB04 Aluminium Rear Suspension Arm by GPM TB4056  [TB4056]

Aluminium rear suspension arm for TB04

This aluminium rear suspension arm is an aftermarket replacement for the Tamiya TB04 platform supplied by GPM as TB4056. It is offered as 1pr and intended for use on TB-04 series touring car models where aluminium parts are used to change suspension response or replace worn plastic arms.

Fitment and installation are straightforward: remove the original rear lower arm, verify the mounting points and hardware match the TB04 geometry, then install the aluminium arm using the original screws and ball studs where applicable. Confirm free movement of the suspension and check wheel alignment after installation.

From a tuning perspective, an aluminium rear arm increases local stiffness compared with typical plastic components, which can reduce flex at the arm mounting and slightly alter rear-end behaviour. Use this part when you need a durable replacement or when tuning roll and traction characteristics for specific track conditions. Adjust damper settings and toe/inclination accordingly to balance the changes.