GMADE R1 Front & Rear Main Shaft Set Adjustable GM237SAA by GPM  [GM237SAA]

Adjustable front and rear main shafts for driveline tuning

Designed for the GMADE R1 ROCK BUGGY chassis, model GM237SAA, this centre main drive shaft set combines steel retention components with an aluminium 6061 T shaft body to reduce spinning mass while keeping fastener areas robust.

Front adjustment runs from 122mm to 132mm and the rear from 105mm to 115mm, providing room to tune length for different slipper settings and differential spacing. Fasteners are held with a steel wire ring to help keep screws secure during rough use.

The lighter aluminium body improves rotational responsiveness compared with a full-steel shaft, helping the drivetrain feel more lively. Adjustable sections mean you can set exact run-length without cutting or swapping fixed parts.

Use these shafts when upgrading worn drive components or when you need adjustable lengths for tuning; verify final lengths with the vehicle static and recheck fasteners after running.