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

Durable steel dog bone for Baja drivetrains

The SBJ118R is an aftermarket steel rear dog bone for HPI Baja RC platforms, intended as a direct replacement for the rear driveline link. Steel construction provides a stiffer, longer lasting link compared with softer factory components and is aimed at model-level maintenance and tuning rather than any full-size use.

Fitting is straightforward for anyone comfortable with basic driveline service: remove the rear wheel and diff output retainers, extract the worn dog bone and install the SBJ118R, making sure it seats correctly in the axle cups and differential output. While reassembling, check hex screw torque and the condition of adjacent bearings to ensure smooth operation and reduce the risk of premature failure.

In tuning terms, replacing dog bones with steel changes drivetrain stiffness and how torque feeds through the rear axle under load. This can influence traction and component life; when adjusting handling, treat drivetrain settings and suspension together rather than blaming the dog bone alone.

As a direct rear driveline replacement for HPI Baja buggies, the SBJ118R steel dog bone is a practical choice for repair and upgraded drivetrains; always verify fitment and supporting hardware during installation.