You will not be allowed to compare more than 4 products at a time
View compareHPI Racing 18 Tooth Pinion Gear Spare for HPI Transmissions
HPI Racing 18 Tooth Pinion Gear Spare for HPI Transmissions
Hurry! Only left 3 in stock
Sold by ToyTooth — Your trusted kids' toy store.
Returns accepted within 30 days | support@toytooth.com
Shipping Information
Shipping calculated at checkout
Shipping cost and estimated delivery will be shown at checkout based on your location.
- Processing Time:3–5 business days
- Tracking number sent via email once dispatched
Returns & Refund
Returns accepted within 30 days of delivery.
Damaged or Defective Item
Free return shipping + replacement or full refund
Wrong Item Received
Free return shipping + replacement or full refund
Change of Mind
Return shipping at customer's expense · Item must be unused & in original packaging
Safety & Compliance
California Proposition 65 Warning
Some products sold on this website may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
www.P65Warnings.ca.govGeneral Product Safety Advisory
Always read the product label, instructions, and safety warnings before use. Do not use damaged or modified products. Store products in appropriate conditions as specified by the manufacturer.
Keep all products out of reach of children unless specifically designed for their use.
Product Authenticity & Notice
All products sold by ToyTooth are 100% authentic, sourced directly from trusted toy suppliers and brands. Product colors and dimensions may vary slightly from images due to screen calibration and manufacturing tolerances.
ToyTooth — Fun Toys for Every Kid, Delivered to Your Door.
Share
Couldn't load pickup availability
Guarantee safe and secure checkout
Description
Description
Overview
The HPI Racing 18T 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 or biasing gear ratio toward more torque (vs. higher-tooth pinions).
Key Features
- Genuine HPI Racing replacement
- 18 tooth count — torque-biased
- Direct factory fit
- Precision-cut teeth
- Durable construction
Performance Benefits
- Stronger acceleration and torque
- Better climbing performance
- 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: 18T
- 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 18T Pinion Gear
Summary
A torque-biased 18T pinion replacement for HPI nitro transmissions.

