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

HPI Baja Steel Rear Wheel Shaft - GPM SBJ039R
Price:
USD$17.00
Brand:
GPM
Model:
SBJ039R
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Engineered rear shaft for HPI Baja platforms

The SBJ039R steel rear wheel shaft is provided as an aftermarket replacement for HPI Baja assemblies. It functions as the rotating axle interface at the rear hub, delivering a robust mounting surface for the wheel and transmitting hub loads into suspension and drivetrain components.

Intended for practical upgrade and maintenance work, this shaft helps limit axial movement at the hub and promotes repeatable wheel alignment under dynamic loads. Verify mating surface tolerances and wheel hex clearances during assembly to secure correct runout and axial play.

Installation procedure: confirm correct seating in the rear hub and wheel hex, replace any fatigued retaining pins or set screws, and ensure bearing assemblies spin freely once installed. Regular inspection for wear and corrosion will maintain predictable chassis behaviour.

Specifications

  • Item: Rear wheel shaft
  • Material: Steel
  • Model Number: SBJ039R
  • Compatibility: HPI Baja

Use SBJ039R when a robust steel replacement shaft is required for HPI Baja rear hub systems; confirm dimensions prior to demanding use.

What critical dimensions should be checked?

Measure overall shaft length, bearing seat diameters and positions, and retaining pin hole spacing to confirm compatibility with your hub assembly.

Does the shaft require preload adjustment?

Preload is set by bearing fit and retaining hardware; ensure bearings run freely without axial slack and adjust retaining components as needed for correct endplay.

Recommended inspection intervals?

Inspect the shaft and mating surfaces after heavy sessions or on a scheduled basis; look for worn bearing seats, pitting, or deformation that could affect alignment.