Upgrade 6mm 7075 Main Shaft for MRX4/MRX4-R - MRX4-12/TI by 3Racing  [MRX4-12/TI]

Overview for 6mm 7075 main shaft

This 6mm main shaft is offered as an aftermarket replacement or upgrade for the Mugen Seiki MRX4 and MRX4-R touring chassis, fitting into the final drive train to transfer torque from gearbox to wheels while supporting spur and pinion loads.

The shaft's primary role is simple: keep drivetrain parts centered along the centerline and resist wear under normal competitive and practice use. When swapping in a new shaft, ensure bearings are correctly seated, check gear alignment, and confirm the assembly rotates freely.

For tuning applications the 7075 aluminium option strikes a useful balance between rigidity and easy serviceability, serving as a stable reference point when setting gear mesh and checking backlash. Routine inspections for nicks, scores, or bending will help avoid erratic gear engagement.

Use this component where a direct swap or equivalent upgrade is required for MRX4/MRX4-R drivetrains; verify bearing fit and gear mesh after fitting and include the shaft in routine maintenance checks.