Tamiya TB04 Front/Rear Aluminium Adjustable Spring Damper by GPM TB4055F/RPBT  [TB4055F/RPBT]

Aluminium front/rear adjustable spring damper

This GPM TB4055F/RPBT unit is an RC-scale front and rear adjustable spring damper produced for the Tamiya TB04 chassis. The assembly pairs aluminium damper bodies with a plastic ball top and is supplied as one pair, intended to replace or upgrade the stock front/rear dampers on TB-04 layouts.

Functionally it serves as a tuning component rather than a standalone system, giving click-free height and spring preload adjustment and a stable mounting point where the plastic ball top links to the suspension linkage. Use it to refine ride feel and transient responses while retaining the TB-04 shock mounting geometry.

Installation is straightforward on TB-04 shock locations: remove the original dampers, transfer springs and retainers if desired, fit the GPM units into the shock towers and suspension arms, and secure ball cups and mounting hardware to original attachment points. After fitting, check for smooth shaft movement and consistent travel through full suspension droop and compression.