Tamiya DF-03 Rear Machined Aluminum Arms DF03RA-05 by 3Racing  [DF03RA-05]

Machined rear arms for DF-03 chassis

The DF03RA-05 rear machined aluminium suspension arms are an RC hop-up meant to take the place of the DF-03's factory plastic rear arms. The metal construction provides a firmer anchoring point for suspension linkages to support more precise setup work.

These arms are a tuning component rather than a guaranteed speed upgrade: aluminium increases structural stiffness versus typical injection-moulded parts, which alters how the rear suspension reacts to changes in springs and dampers. This helps reduce flex-related variability when comparing setups.

Fitting notes: the arms locate into the DF-03 rear suspension positions and use the chassis' existing pins and mounting hardware. Standard hobby hex tools are normally adequate for bolt-up, but always verify free movement and fit before completing any setup changes.

Upkeep and tuning: periodically check pivot points and mounting bolts for wear or loosening, and pair the arms with appropriate shock lengths and spring rates to fine-tune rear balance while not relying on assumed dimensions.

A no-nonsense hop-up for hobbyists seeking a firmer rear mounting platform to make suspension tuning more consistent on DF-03 cars.