These are spare hub carrier parts for the TRF420 racing car chassis. They are an improved and more durable design compared to the previous design found in the TRF417/418/419 era of cars.

- TRF420 F Parts x1
- Components are molded in carbon fiber-reinforced plastic for superior rigidity.
- The design was revised specifically for the TRF420 chassis, with greater resistance to shocks and crashes.
- Upper and lower flanged tubes are now identical.
- For use with 3mm diameter shafts (sold in Item 51637).
- Compatible with cars using Item 51639 TRF420 D Parts (Suspension Arms).