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

Heavy duty 16T pinion for Baja platforms

This 16-tooth steel motor pinion with a 5mm bore SBJ016TO has a regraded tooth profile created for HPI Baja platforms. It functions as an aftermarket steel replacement that mates with the stock spur gear or SBJ057T, giving a harder tooth surface where longer wear is wanted.

Installation is simple: slide the pinion onto a 5mm motor shaft, set the gear mesh against the spur, and tighten the set screw. Check backlash and tooth contact visually and slowly rotate the drivetrain to verify smooth engagement; the regraded profile helps initial engagement while you set the final mesh to your chassis clearances. Supplied as 1pcs.

Changing pinion tooth count adjusts acceleration versus top speed, while this 16T steel option mainly improves durability and mesh stability compared with softer materials. Use it when you want a straightforward, long wearing replacement that works with the stock spur gear or SBJ057T without other drivetrain changes.