HPI Baja Pinion Set 16T/18T Hardened Steel 5mm - SBJ01618TO by GPM  [SBJ01618TO]

HPI Baja Steel Pinion 16T & 18T With 5mm Bore, Profile Regraded, Both For Use With Stock Spur Gear Or Sbj057T - 2pcs set - GPM SBJ01618TO
Price:
NZD$34.79
Brand:
GPM
Model:
SBJ01618TO
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Hardened steel pinions for HPI Baja rigs

This steel pinion set is supplied as two pieces for HPI Baja compatible models, offering one 16T and one 18T gear. Each pinion has a 5mm bore to suit standard motor shafts and the tooth profile is regraded to mesh with the stock spur gear or the SBJ057T spur. The set is intended for quick gearing changes so you can tune acceleration versus top speed without replacing the spur.

Steel construction gives better wear resistance than softer materials, making these pinions suitable for mixed on-road and off-road running where torque loads can accelerate wear. The small step between 16T and 18T lets you test drive feel and motor load with minimal setup time.

Compatible Models

  • Stock Spur Gear
  • Sbj057T

Use this pair to trial final drive changes on HPI Baja builds, set correct mesh and backlash, and replace worn pinions with hardened-steel equivalents.

Do these pinions fit brushless motors with 5mm shafts?

Yes, the 5mm bore is compatible with most brushless and brushed motors that use a 5mm output shaft, but verify your motor's shaft diameter first.

Will swapping to 16T or 18T change gearing much?

Switching between 16T and 18T gives a small but noticeable change in final drive; 16T favours acceleration while 18T raises top speed slightly.

Should I shim the pinion on installation?

Set correct pinion height and check backlash; shims or adjusters may be needed to achieve smooth mesh without binding.

Are these pinions suitable as direct replacements?

They are intended as direct steel replacements for compatible setups, matching common tooth profile and shaft bore sizes noted above.

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