Team Corally 32DP Pinion Gear Short 21 Teeth Hardened Steel 5mm Shaft C-72521

Overview

The Corally 32 DP Pinion Short Hardened Steel 21 Teeth Shaft Dia. 5mm (C-72521) is a premium high-performance pinion gear engineered for RC car enthusiasts across the UK seeking precision, durability and reliable drivetrain performance. Whether you're racing competitively, enjoying weekend bashing, or fine-tuning your RC car setup, this hardened steel pinion delivers the performance characteristics that experienced RC hobbyists demand. Manufactured by Team Corally, a brand recognised for quality RC components, this pinion gear represents the perfect upgrade or replacement for drivers looking to enhance their vehicle's drivetrain and achieve optimal gear ratios for their specific track conditions and driving style.

This 21-tooth pinion is part of Corally's comprehensive range of 32DP gears, allowing you to find the perfect gear ratio for any track or driving scenario. The pinion fits all RC cars equipped with 32DP gears and 5.0mm motor shafts, making it a versatile choice for numerous popular RC models. The short format design ensures optimal fitment in tight spaces while maintaining the structural integrity required for serious RC driving. If you're running a brushless RC car UK setup or upgrading a brushed motor vehicle, this pinion will integrate seamlessly into your existing drivetrain configuration.

What sets this Corally pinion apart in the competitive UK RC market is its commitment to engineering excellence and manufacturing precision. Every gear is inspected and marked with the tooth number for easy identification during maintenance or setup changes. When you invest in the C-72521, you're choosing a component that has been designed with the demanding requirements of serious RC enthusiasts in mind.

Key Features

• Special Hardened Steel Construction — Unlike standard steel pinions, this gear is manufactured from specially hardened steel that provides superior toughness and exceptional durability through countless hours of driving, preventing premature wear and maintaining consistent performance across extended RC sessions.
• CNC Cut Teeth with Perfect Concentricity — Each tooth is precision-cut using computer numerical control machinery, ensuring perfect tooth shape and geometry that guarantees smooth, vibration-free operation and reduces noise during acceleration and deceleration.
• Ultra-Precise Manufacturing Tolerances — Created on specialised gear machines, every pinion features ultra-precise tooth shaping and ultra-true running characteristics that eliminate vibration and ensure unparalleled concentricity for reliable power transmission.
• 32DP Module Specification — The 32 Diametral Pitch (32DP) rating means this pinion is compatible with all 32DP spur gears and drivetrain components, allowing seamless integration into compatible RC car systems and giving you flexibility in gear ratio selection.
• 21-Tooth Configuration — The 21T specification provides a specific gear ratio when paired with compatible spur gears, enabling you to optimise your RC car's acceleration and top speed characteristics for your particular driving conditions and motor setup.
• 5.0mm Motor Shaft Compatibility — Designed specifically for 5.0mm diameter motor shafts, this pinion ensures a secure, wobble-free fit that maintains precise alignment and prevents slippage or timing issues during aggressive acceleration.
• Tooth Number Marking — Each pinion is clearly marked with its tooth count for quick and easy identification, eliminating confusion during gear swaps and making it simple to maintain records of your various drivetrain configurations.
• Short Format Design — The short length specification (13mm overall) ensures the pinion fits efficiently in RC car motor pods and transmission housings, leaving adequate space for other components whilst maintaining structural strength.
• Professional-Grade Engineering — Made in Europe by Team Corally, this pinion reflects the high manufacturing standards expected by competitive and serious recreational RC car drivers throughout the UK and across Europe.
• 2.0mm Hex Key Compatibility — The pinion uses a standard 2.0mm hex key for mounting and removal, making it simple to fit or replace using tools you likely already have in your RC maintenance kit.

Technical Performance

The Corally C-72521 pinion gear represents a significant investment in drivetrain reliability and performance. Manufactured from hardened steel rather than standard aluminium or softer materials, this component will withstand the forces generated by modern brushless motors whilst maintaining its precise tooth geometry through countless acceleration cycles. The CNC cutting process ensures that each tooth profile matches exactly, eliminating the micro-vibrations that can occur with cast or stamped gears. With a 6.20mm teeth width, this pinion offers generous surface contact area with the spur gear, distributing forces evenly and reducing the risk of tooth stripping even during aggressive competition driving or high-powered brushless RC car setups. The 13mm overall length fits perfectly within standard transmission housings, and the 5.0mm shaft diameter accommodates the vast majority of modern RC motors available in the UK market. Whether you're running a competitive 4WD buggy, an off-road truck, or a high-speed touring car, this pinion's engineering delivers the performance foundation that serious driving demands.

What's in the Box

• 1x Corally 32 DP Pinion Gear — 21 Teeth, Short Format, Hardened Steel

What You Need to Complete

• RC car with 32DP drivetrain and 5.0mm motor shaft
• 2.0mm hex key for installation and removal
• Compatible 32DP spur gear (selected based on desired gear ratio)
• Appropriate motor for your RC vehicle and driving style

Frequently Asked Questions

• What is the difference between 32DP and other gear pitches like 48DP? — DP (Diametral Pitch) refers to the gear tooth size and spacing. 32DP gears have larger teeth than 48DP gears, which makes them more robust and suitable for high-powered motors and tough driving conditions. 32DP is the standard choice for serious RC racing and bashing in the UK, whilst 48DP is often used in lighter or more precision-focused applications. This C-72521 pinion is designed for 32DP systems, so you must pair it with compatible 32DP spur gears.
• Is this pinion suitable for brushless RC cars? — Yes, absolutely. This hardened steel pinion is specifically engineered to handle the high torque and rapid acceleration produced by brushless motors. Many competitive RC car UK drivers use this type of component in brushless setups precisely because the hardened steel resists the forces that would damage softer alternatives. If you're running a brushless RC car, this pinion is an excellent choice.
• What gear ratio will this create with different spur gears? — The gear ratio is calculated by dividing the number of spur gear teeth by the pinion teeth. This 21-tooth pinion paired with a 49-tooth spur creates a 2.33:1 ratio, whilst a 57-tooth spur produces a 2.71:1 ratio. Lower ratios favour top speed, whilst higher ratios favour acceleration. Consult your vehicle's manual or your RC retailer for the recommended ratios for your specific model and driving style.
• How does hardened steel compare to standard steel or aluminium pinions? — Hardened steel offers significantly superior wear resistance and durability compared to standard steel or aluminium alternatives. The specialised hardening process increases the gear's ability to withstand repeated stress cycles without deformation, making it the preferred choice for high-performance RC driving. Whilst hardened steel pinions are often more expensive initially, their longevity makes them more economical over time.
• Will this pinion fit my RC car? — This pinion is compatible with any RC car featuring a 32DP drivetrain and a 5.0mm diameter motor shaft. Most popular RC models from manufacturers like FTX, Traxxas, ARRMA, and Losi use these standard specifications, but you should verify your vehicle's specifications before purchasing. Check your user manual or contact your RC retailer to confirm compatibility.
• How often will I need to replace this pinion? — Thanks to its hardened steel construction and precision manufacturing, this pinion is designed for extended service life. With proper maintenance, regular cleaning, and appropriate lubrication, you can expect thousands of driving hours before replacement becomes necessary. The durability of this component makes it a sound investment for serious RC enthusiasts.
• What tools do I need to install this pinion? — Installation is straightforward and requires only a 2.0mm hex key for fastening and removal. You'll also need basic RC maintenance tools such as a small socket set for removing the motor and transmission components if a full drivetrain rebuild is planned. Most RC enthusiasts in the UK have these tools as part of their standard maintenance kit.
• Can I use this pinion with different tooth count spur gears? — Yes, this 21-tooth pinion will work with any compatible 32DP spur gear. However, different spur gear tooth counts will produce different overall gear ratios, affecting your vehicle's acceleration and top speed characteristics. Experiment with various combinations to find the setup that suits your specific track or driving conditions best.

Why Buy from RC Model Shop?

RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the CORALLY 32 DP PINION SHORT HARDENED STEEL 21 TEETH SHAFT DIA. 5mm C-72521 today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.