When wear shows up in the drivetrain, replace the bearing holders with the Tamiya 51645 TRF420 K-Parts SP-1645 Spare Parts to restore correct clearances. These parts are matched to the TRF420 chassis to ensure steady, predictable rotation under load.
These holders fit the TRF420 mounting pattern and are intended for straightforward swap-in service. Confirm bearing orientation during assembly and torque fasteners to recommended values to keep the setup reliable on track or practice runs.
OEM Tamiya components are made for longevity and consistent behaviour. Replacing worn holders with genuine parts helps retain suspension character and reduces maintenance surprises during events.
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