Traxxas 12-Tooth Pinion Gear 32-Pitch Hardened Steel TRX3942X

Overview

The Traxxas 12-T Pinion Gear (32-pitch) Set TRX3942X is an essential upgrade component for RC enthusiasts in the UK who demand reliability and performance from their brushless electric RC vehicles. This heavy duty, hardened steel pinion gear is engineered to withstand the demands of competitive racing and weekend bashing alike, making it a critical replacement part for maintaining peak performance in your RC car, truck or crawler. Whether you're running a Traxxas Rustler Ultimate VXL, TRX-4 Bronco, TRX-4 Defender or compatible Team Associated models, this pinion gear delivers the durability and precision engineering that serious RC hobbyists expect.

Pinion gears are fundamental components in any electric RC drivetrain, transferring power from the motor to the main gear and ultimately to your vehicle's wheels. The 12-tooth configuration paired with the 32-pitch (32-diametral pitch) specification makes this an ideal choice for a range of popular ready-to-run and race-ready RC models. The hardened steel construction ensures exceptional durability under load, resisting wear and tooth stripping that can occur with standard gears during aggressive driving or racing conditions. If you're looking to keep your brushless RC vehicle running smoothly or need a replacement gear after wear, this Traxxas original part is the trusted choice for RC model shops and individual enthusiasts across the UK.

RC Model Shop stocks genuine Traxxas components because we understand that authentic OEM parts are crucial for reliability and longevity. This pinion gear is precision-manufactured to Traxxas's exacting standards, ensuring perfect mesh with your vehicle's main spur gear and delivering consistent performance session after session.

Key Features

• Heavy Duty Hardened Steel Construction — The pinion gear is manufactured from hardened steel, significantly increasing its resistance to wear, deformation and tooth stripping compared to standard materials, which means you'll enjoy longer service life and more reliable power transfer during intensive driving sessions.
• 12-Tooth Configuration — The 12-tooth design is optimised for a broad range of popular Traxxas and Team Associated RC vehicles, providing the ideal balance between acceleration and top speed for most driving scenarios and skill levels.
• 32-Pitch Specification (32dp) — The 32-pitch measurement indicates the tooth size and spacing, ensuring perfect compatibility and smooth meshing with the main spur gear in supported vehicles, which prevents grinding, noise and premature wear.
• 3.2mm Bore Diameter — The precisely machined 3.2mm bore fits securely onto standard motor shafts used in contemporary brushless RC vehicles, guaranteeing accurate alignment and eliminating wobble or runout that could cause vibration or uneven gear wear.
• OEM Traxxas Quality — As an official Traxxas replacement part manufactured to original equipment manufacturer specifications, this pinion gear maintains the performance characteristics and reliability your RC vehicle was engineered to deliver.
• Wide Vehicle Compatibility — This pinion gear is compatible with multiple popular models including Traxxas Rustler Ultimate VXL (4x4), Traxxas TRX-4 2021 Ford Bronco, Traxxas TRX-4 Defender 4WD, and Team Associated MT10 models (Rival MT10 Brushless, MT10 Factory Team, MT10 Classic), making it a versatile upgrade option.

Technical Performance

The Traxxas 12-T Pinion Gear represents precision engineering at its finest, combining hardened steel materials with meticulous manufacturing tolerances to deliver reliable performance in demanding RC applications. The 32-pitch specification aligns with industry-standard gear sizing, ensuring compatibility across a broad ecosystem of RC vehicles and replacement components. The hardened steel material composition is crucial for performance—standard materials would degrade rapidly under the torque loads generated by modern brushless motors, particularly in higher-performance configurations like the brushless systems found in the Traxxas Rustler Ultimate VXL 4x4 and TRX-4 platform vehicles. The 3.2mm bore diameter accommodates the motor shafts of contemporary brushless RC cars, providing a secure, concentric fit that minimises runout and vibration. The 12-tooth configuration strikes an optimal balance between acceleration and top speed across the wide range of compatible vehicles, from high-speed stadium trucks to versatile 4x4 crawlers. For RC hobbyists in the UK seeking replacement gears or performance optimisation, this pinion gear delivers the durability and precision necessary for extended competitive use or recreational bashing without compromise.

What's in the Box

• Traxxas 12-T Pinion Gear (32-pitch) — single hardened steel pinion gear with 3.2mm bore

Frequently Asked Questions

• What vehicles is the Traxxas 12-T Pinion Gear TRX3942X compatible with? — This pinion gear is compatible with a wide range of Traxxas and Team Associated models, including the Traxxas Rustler Ultimate VXL 4x4 (both green and blue variants), Traxxas TRX-4 2021 Ford Bronco (available in orange, black, red and white), Traxxas TRX-4 Defender 4WD RTR (green, sand, red and silver), and Team Associated MT10 models including the Rival MT10 Brushless RTR, Rival MT10 Factory Team Kit, and MT10 Classic Truck Builders Kit. Always verify your specific model in the compatibility list before ordering.
• Why choose hardened steel pinion gears over standard materials? — Hardened steel offers superior durability and wear resistance compared to standard steel or aluminium pinion gears. This matters because brushless motors generate substantial torque, particularly in performance-oriented RC vehicles, and hardened steel resists tooth stripping, deformation and wear far more effectively, extending the service life of your gear and maintaining smooth power transmission over many driving sessions.
• What does 32-pitch (32dp) mean and why is it important? — The 32-pitch specification refers to the diametral pitch, which defines the tooth size and spacing. A 32-pitch gear has smaller, more closely-spaced teeth than lower-pitch gears, enabling smoother meshing and more efficient power transfer. The 32-pitch specification ensures this pinion gear works seamlessly with the 32-pitch spur gears found in compatible vehicles, preventing grinding, noise and premature wear.
• Is this a replacement gear or upgrade gear? — The Traxxas 12-T Pinion Gear is primarily a replacement part—it serves as an original equipment manufacturer (OEM) substitute for worn or damaged gears in compatible vehicles. However, because it's manufactured from hardened steel, it represents a durability upgrade over any standard pinion that may have come with your RC vehicle, making it suitable for both replacement and performance enhancement.
• What is the 3.2mm bore and what does it fit? — The 3.2mm bore is the central hole through which the motor shaft passes. This 3.2mm diameter accommodates the standard motor shafts found in contemporary brushless RC motors used in the compatible Traxxas and Team Associated vehicles, ensuring a tight, concentric fit that eliminates wobble and ensures proper gear alignment.
• How do I know if my pinion gear needs replacing? — Signs that your pinion gear needs replacement include visible tooth damage or chipping, grinding noises when accelerating, reduced power transfer efficiency, or visible wear on the gear teeth. If you've damaged a gear in a crash or through normal wear over many driving sessions, sourcing an OEM Traxxas replacement like the TRX3942X ensures you return your RC vehicle to original performance specifications.
• Can I use this pinion gear with Team Associated vehicles? — Yes, the Traxxas 12-T Pinion Gear is compatible with several Team Associated MT10 models, including the Rival MT10 Brushless RTR variants, the Rival MT10 Factory Team Kit, and the MT10 Classic Truck Builders Kit. The 32-pitch 12-tooth specification and 3.2mm bore make it a drop-in replacement for these models.

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 Traxxas 12-T Pinion Gear (32-pitch) Set TRX3942X 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.