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

Adjustable front & rear main drive shaft

This is a center main drive shaft set designed for the GMADE R1 ROCK BUGGY chassis, manufactured by GPM as model GM237SAA. The assembly combines steel retention elements with an aluminium 6061 T shaft body to offer a balance between durability and reduced rotating mass.

Key mechanical details are the adjustable length ranges: the front shaft adjusts from 122mm to 132mm while the rear adjusts from 105mm to 115mm, allowing fitment tolerance and fine alignment when setting driveline geometry. A steel wire ring secures the screw fittings to help keep fasteners in place under vibration.

From a tuning and service perspective, the aluminium shaft body is lighter than a full-steel alternative, which can help reduce rotating inertia and improve drivetrain response. The adjustable sections let you trim run-lengths to suit slipper settings, differential spacing, or chassis preload without resorting to cutting or replacing fixed-length parts.

Use these shafts when replacing worn driveline parts or when you need adjustable lengths for setup; verify lengths before final installation and check fastener security after first runs.