TAMIYA TT-01d Alloy Front Upper Arm by GPM TT054D  [TT054D]

Front upper arm for TT-01d

This alloy front upper arm is an RC-scale replacement part produced by GPM for the TAMIYA TT-01d platform, model TT054D. It is intended as a direct swap for the front upper arm on TT-01d cars, serving the roles of repair and incremental tuning without altering the chassis layout.

The component is described as an aluminium alloy piece that replaces the stock front upper arm to increase structural stiffness compared with typical plastic arms. On-track use focuses on maintaining suspension geometry while giving a firmer front end feel that can slightly affect steering responsiveness and camber behavior under load.

Installation follows standard arm replacement procedure for the TT-01d layout: remove the original arm, transfer existing hinge pins and hardware, fit the alloy arm in the same orientation, and verify free movement through the suspension travel. After fitting, check alignment and wheel toe/camber as required for your setup.

When tuning, treat this arm as a passive stiffness change rather than an active geometry modification; pairing it with existing suspension settings will produce the most predictable results. As an aftermarket alloy part for RC use it is intended exclusively for model cars and track or hobby use.