GPM Racing Harden Steel #45 Motor Gear 18T for Losi 1/6 Super Baja Rey 4x4 (SSB018T)

18T precision pinion for Super Baja

This 18T motor pinion is a precision aftermarket component for Team Losi Super Baja platforms, supplied as SSB018T. The pinion is manufactured from hardened steel #45 and is intended strictly for electric motor drive use, not for full-size or road vehicle applications.

Functionally, the 18T replaces the stock 19T to change the final drive ratio, allowing a measured shift in acceleration versus top speed characteristics. Proper installation requires setting the motor mount to the hole marked 18T so the pinion engages the motor shaft at the correct axial position.

Engineering notes: produced in hardened steel #45 for increased wear resistance under typical RC motor torque cycles, the pinion is designed to mate with the vehicle spur and existing drivetrain at the matched gear mesh. Verify backlash and mesh pattern after installation to prevent premature tooth fatigue.

Included items in the package are listed here for clarity: motor gear - 1 pcs, 5×5 SST screw - 1 pcs. Confirm screw length and thread engagement before final tightening and secure the pinion to the motor shaft following established pinion mounting procedures for Super Baja platforms.

This item is compatible with

• TEAM LOSI Super BAJA REY 4X4
• 1/6 4WD SUPER BAJA REY 2.0 - LOS05021

How does changing from 19T to 18T affect drivetrain loads?

Dropping one tooth increases the motor rpm for a given wheel speed, shifting torque demand. Validate motor temperature and current draw during initial runs to ensure the motor and ESC operate within safe limits.

What mesh pattern should I aim for with this hardened steel pinion?

Aim for a consistent mesh pattern with about one to two light bands of contact across the tooth face when rotated under light load. Use a marking compound to confirm and adjust motor position incrementally.

Are there special maintenance steps for hardened steel gears?

Inspect teeth for surface fatigue or burrs, remove abrasive contaminants after off-road runs, and ensure fasteners remain secure. Replace the pinion if significant pitting or deformation appears. Write Product Review Please sign in your account before you can write any review. Sign In Close

Made to order: GPM Racing parts are shipped to us from GPM's factory, so please allow around 14 days for dispatch.