HPI Baja Steel Pinion 18T 5mm SBJ018TO by GPM  [SBJ018TO]

HPI Baja Steel Pinion 18T Of 5mm Bore, Profile Regraded, Use With Stock Spur Gear Or Sbj057T - 1pc - GPM SBJ018TO
Price:
£8.33
Brand:
GPM
Model:
SBJ018TO
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Product summary 18T pinion

This 18-tooth steel pinion is a direct-fit replacement intended for HPI Baja vehicles and is supplied as a single unit. The 5mm bore and revised tooth profile are matched to the stock spur gear or the SBJ057T option so the gearbox layout remains unchanged.

Use this pinion when performing a drivetrain swap or when modifying final drive ratios to find the right balance between acceleration and top speed. Steel construction helps maintain mesh integrity and reduces wear under regular use.

Installation guidance: make sure the bore fully seats on the motor shaft, establish the manufacturer-recommended mesh clearance, and tighten the set screw to secure the pinion without over-torquing. Re-check mesh after a brief run and re-tighten if required.

Offered as 1pc and intended for scale RC use only.

Will this pinion fit my HPI Baja without modifications?

Yes, it is designed for direct fit with the stock spur or SBJ057T, provided the motor shaft is the standard 5mm diameter.

How often should I check gear mesh after fitting?

Check mesh after the first short run and again after a few sessions; vibrations and settling can alter clearance and require minor re-torqueing.

Does this pinion suit competition use?

Steel pinions are commonly used for regular and club competition because they resist wear and keep engagement consistent, though monitor condition under heavy running.

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