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

Rear wheel axle shaft for HPI Baja applications

SBJ039R is a steel rear wheel shaft supplied as an aftermarket replacement for HPI Baja vehicles. It provides the rotating axle interface at the rear hub, offering a secure mount for the wheel while transmitting hub loads into suspension and drivetrain elements.

The part is aimed at plain mechanical replacement and basic tuning: increasing stiffness at the shaft can cut down axial play at the hub and help maintain wheel alignment under heavy loads. During installation, check mating faces and wheel hex clearances to ensure correct runout and clearance.

Fitment notes: confirm the shaft mates with your rear hub and wheel hex, replace worn retaining pins or set screws, and verify the hub rotates freely with bearings installed. Periodic checks for wear and corrosion will preserve predictable handling.

Ideal when you need a simple, steel aftermarket rear axle shaft for HPI Baja hub assemblies; always confirm fit before demanding use.