HPI Baja 16T Steel Pinion, 5mm Bore by GPM SBJ016TO  [SBJ016TO]

Steel 16T Pinion for HPI Baja

This steel pinion is a 16-tooth, 5mm-bore motor pinion with a regraded tooth profile designed for use on HPI Baja platforms. It is offered by GPM as an aftermarket steel pinion intended to mesh with the stock spur gear or with SBJ057T, providing a direct replacement option where a steel, reprofiled tooth is preferred.

Installation is straightforward: fit the pinion onto a 5mm motor shaft, align the gear mesh with the spur gear, and secure the pinion's set screw. Verify proper backlash and tooth contact visually and by gently rotating the drivetrain; the regraded profile aims to improve initial engagement but final mesh should be set to your chassis' standard clearances. Supplied as 1pcs.

For tuning, changing pinion tooth count will adjust acceleration versus top speed, while this 16T steel option mainly affects durability and mesh stability compared to softer materials. Use it when you need a simple, durable replacement that works with the stock spur gear or SBJ057T without altering other drivetrain components.