HPI Racing Pinion Gear 21 Tooth (ONLINE ORDER ONLY)

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

• Type: Pinion Gear
• Tooth Count: 21T
• 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.