Overview
The HPI Racing 21T Pinion Gear is a genuine replacement pinion gear designed as a spare part for HPI transmissions originally supplied as #87218 and #87220 assemblies. The pinion meshes with the spur gear to transfer engine power into the drivetrain.
This direct-fit replacement is ideal for refreshing worn pinions and maintaining smooth, reliable drivetrain operation.
Key Features
- Genuine HPI Racing replacement
- 21 tooth count
- Direct factory fit
- Precision-cut teeth
- Durable construction
Performance Benefits
- Smooth power transfer
- Reduced drivetrain noise
- Reliable, long-lasting performance
Usage Notes
- Set proper gear mesh — slight backlash
- Replace pinion and spur as a pair when worn
Technical Specs
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Type: Pinion Gear
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Tooth Count: 21T
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Manufacturer: HPI Racing
Fitment
- Spare part for HPI transmission assemblies #87218 and #87220
- HPI nitro vehicles using compatible transmission
What's Included
- (1) HPI Racing 21T Pinion Gear
Summary
A reliable 21T pinion gear replacement for HPI nitro transmissions.
