Tamiya DF-03 Rear Hop-Up Suspension Arms DF03RA-05 by 3Racing  [DF03RA-05]

DF-03 rear hop-up aluminium arms

The DF03RA-05 rear aluminium suspension arms replace the standard plastic rear arms on the Tamiya DF-03 chassis with a machined metal alternative. These arms aim to give a firmer mounting platform for linkages so you can refine rear setup without changing mounting geometry.

Designed as a tuning aid rather than a power upgrade, the metal arms offer greater rigidity than common injection-molded replacements, which changes the rear suspension response to different spring and damper settings. This can help when iterating on spring rates and shock positions.

Installation: the arms are intended for the DF-03 rear mounting points and fit using the chassis' existing pins and fasteners. Standard hobby tools are sufficient; confirm there is no binding and that movement freeplay is acceptable before finalising adjustments.

Care and setup tips: check pivot bushes and fasteners periodically for wear, and pair these arms with the correct shock lengths and springs to achieve the desired rear balance without assuming exact part dimensions.

A practical hop-up for builders who want a more stable rear mounting platform for consistent tuning sessions on Tamiya DF-03 cars.