Tamiya TB-04 Rear Suspension Arm Upgrade TB4056 by GPM  [TB4056]

Aluminium rear arm for TB-04 touring setups

An aluminium rear suspension arm intended as a direct aftermarket replacement for TB-04 touring cars, supplied under the TB4056 part number. It is provided as one pair for users wanting a metal upgrade over factory plastic arms.

To fit, remove the original rear lower arm and verify that the TB-04 mounting points and fasteners align, then mount the aluminium arm with the original screws and ball studs when compatible. Move the suspension through its travel to confirm clearance and recheck wheel alignment after fitting.

In use, the aluminium arm increases stiffness at the local mounting points compared to plastic, which can reduce unwanted flex and change rear-end behaviour. Consider tuning damper rates and toe to balance handling after installation.