HPI Baja 18T Steel Pinion Gear SBJ018T by GPM  [SBJ018T]

Aftermarket pinion for HPI Baja

The SBJ018T is an aftermarket 18-tooth steel pinion created as a direct replacement for HPI Baja drivetrains. Constructed in steel, this pinion prioritizes wear resistance and steady tooth engagement to maintain dependable power transfer from motor to spur gear in off-road RC use.

Made for compatibility with HPI Baja platforms, this 18T pinion suits hobbyists who service drivetrains regularly or test alternate gear ratios on mixed terrain. The 18-tooth count is a common compromise between acceleration and top speed; choose this pinion while matching motor RPM, spur gear size, and final drive goals.

Installation notes: confirm clean mesh with the spur gear, set correct center-to-center spacing, and verify motor shaft diameter before final fitment. Rotate the driveline slowly to check tooth contact and secure set screws to the recommended torque for your motor shaft. Routine checks for tooth wear and runout will protect drivetrain efficiency.

Use this steel 18T pinion when you need a long-wearing replacement for HPI Baja drivetrains or when experimenting with gear ratios for performance changes.