HPI Baja Rear Dog Bone Steel SBJ118R by GPM  [SBJ118R]

Reinforced steel rear dog bone for Baja

The SBJ118R is an aftermarket steel rear dog bone made for RC-scale HPI Baja chassis as a direct replacement for the rear driveline connection. Its steel construction is chosen for greater stiffness and improved wear resistance compared with softer stock links, intended for model-level maintenance and setup rather than any full-size application.

Fitting is straightforward for those with basic driveline experience: remove the rear wheel assembly and the diff output retention hardware, withdraw the worn dog bone, and insert the SBJ118R, ensuring correct seating in the axle cups and differential output. Inspect hex screws and nearby ball bearings during reassembly to confirm smooth rotation and avoid early wear.

From a tuning perspective, swapping to a steel dog bone increases drivetrain stiffness and can change how torque is transferred through the rear axle under load. That can influence traction and component longevity; when tuning handling, evaluate drivetrain lash and suspension setup in combination rather than attributing changes to the dog bone alone.

As a replacement rear driveline link for HPI Baja buggies, the SBJ118R steel dog bone offers a practical, tougher alternative for repairs and upgraded drivetrains; always verify fitment and supporting hardware during installation.