Overview
The HPI Racing 10-Tooth Pinion Gear is a precision-machined drivetrain component designed for HPI's smaller-scale electric platforms. Sized in module 0.5 (M0.5) with a 2.3mm bore, it pairs with matching spur gears to deliver consistent power transfer and reliable mesh.
Genuine HPI factory-spec construction ensures clean tooth engagement, smooth operation, and the kind of long-lasting wear resistance you expect from OEM hardware.
Key Features
- Genuine HPI Racing OEM pinion gear
- 10-tooth count
- Module 0.5 (M0.5) pitch
- 2.3mm bore
- Precision-machined for smooth mesh
Performance Benefits
- Smooth, consistent power transfer to the spur gear
- Lower tooth count provides additional torque for crawling and acceleration
- Resists wear under repeated driving cycles
- Direct factory fit – no modification required
Usage Notes
- Set proper gear mesh to avoid binding or gear strip
- Use a small amount of grease on tooth surfaces
- Tighten set screw onto motor shaft flat with threadlock
- Inspect periodically for tooth wear
Technical Specs
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Type: Pinion Gear
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Tooth Count: 10T
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Pitch: Module 0.5 (M0.5)
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Bore: 2.3mm
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Manufacturer: HPI Racing
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Part Number: 161249
Fitment
- HPI Mini King and other HPI 1/18 scale electric platforms specifying M0.5 / 2.3mm bore pinion gears
- Compatible with motors having a 2.3mm output shaft
- Verify part number and pitch against your vehicle's manual prior to ordering
What's Included
- (1) HPI Racing 10T (0.5M / 2.3mm) Pinion Gear
Summary
Keep your drivetrain running smooth and strong with the HPI Racing 10T M0.5 Pinion Gear – a precision OEM part that delivers reliable performance for small-scale HPI builds.
