HPI Baja Rear Wheel Shaft SBJ039R Steel Replacement by GPM  [SBJ039R]

Rear wheel shaft compatible with HPI Baja

The SBJ039R steel rear wheel shaft is an aftermarket replacement intended for HPI Baja chassis. It serves as the rotating axle interface at the rear hub, giving a secure mounting point for the wheel and transferring hub loads into suspension and drivetrain parts.

Its purpose is simple mechanical replacement and modest tuning: a correctly sized, stiffer shaft reduces axial play at the hub and helps the wheel retain alignment under load. During fit-up, inspect mating surfaces and wheel hex clearances to ensure acceptable runout.

Fitment advice: confirm the shaft matches your rear hub and wheel hex, replace any worn retaining pins or set screws, and ensure bearings allow the hub to spin freely. Routine inspection for wear and corrosion will support consistent handling characteristics.

Opt for this steel shaft when you need a straightforward aftermarket rear axle replacement for HPI Baja hubs; always verify dimensions before serious running.