Tamiya F103RM Graphite Main Shaft by 3Racing F103RM-02  [F103RM-02]

Graphite main shaft for F103RM

This is an RC-scale graphite main shaft designed for the Tamiya F103RM chassis, supplied by 3Racing as part number F103RM-02. The part uses graphite material to give a stiffer central drive member compared with standard plastic shafts, and it is intended for hobbyists who tune chassis balance and driveline response on 1/10-scale on-road models.

Functionally the shaft replaces the kit main shaft and acts as the torsional spine of the driveline. In practice this affects how quickly the chassis responds to throttle and steering inputs by altering torsional flex between front and rear assemblies. The component is focused on tuning: stiffer shafts tend to reduce mid-corner roll and can tighten handling when combined with suspension and weight adjustments.

Installation is straightforward for those familiar with F103-series maintenance: remove the original shaft according to your kit manual, inspect mating bearings and spacers for wear, slide the graphite shaft into the drive stack, and reassemble using the kit’s fasteners while keeping alignment true. After installation check driveline freeplay and rotate the wheels to confirm smooth operation before running the car.