Traxxas 12-T Pinion Gear 32-Pitch 3mm Motor Shaft RC Car Tuning TRX3919

Overview

The Traxxas Gear, 12-T pinion (32-pitch)/ set screw TRX3919 is an essential performance tuning component for RC enthusiasts across the UK who want to fine-tune their Traxxas models. Whether you're running an RC car UK track day, bashing in the local park, or preparing for competitive racing, this pinion gear gives you precise control over your vehicle's acceleration and top speed characteristics. Traxxas pinion gears are recognised as industry-standard components for serious RC hobbyists, and this 12-tooth option represents one of the most popular configurations for balanced performance across a wide range of Traxxas models and running conditions.

Designed with meticulous engineering precision, this pinion gear allows you to fine-tune the performance of your ready to run RC car or truck by changing gear ratios to suit different terrain, weather conditions, and racing formats. The beauty of having multiple pinion gear options is that you can optimise your setup without purchasing entirely new vehicles or chassis—making this one of the most cost-effective performance upgrades available to the RC community. From weekend bashers to dedicated competitors, tuning your gearing is a fundamental skill that separates amateur setups from championship-winning machines.

This specific 12-tooth configuration represents a mid-range option in the Traxxas pinion gear lineup, offering excellent versatility for drivers who want to balance acceleration with top speed. The included set screw ensures secure installation on your motor shaft, and the precision manufacturing means you can rely on consistent, predictable performance lap after lap.

Key Features

• 12-Tooth Configuration — This represents a moderate gear ratio that provides a balanced blend of acceleration and top speed, making it ideal for diverse running conditions and driving styles across different terrain types.
• 32-Pitch Specification — The 32-pitch designation indicates this gear is engineered to work seamlessly with standard Traxxas motor configurations and drivetrain components, ensuring perfect meshing and efficient power transfer.
• 3mm Motor Shaft Compatibility — Designed specifically to fit 3mm diameter motor shafts, this pinion gear works with the vast majority of modern Traxxas brushless and brushed motor setups used in their ready to run RC vehicles.
• Included Set Screw — A hardened steel set screw is included in the package, providing secure fastening to your motor shaft and preventing unwanted slipping or rotation during operation, which could compromise performance and safety.
• Precision Manufactured — Traxxas pinion gears are manufactured to exacting tolerances, ensuring smooth operation, minimal backlash, and consistent gear meshing with your spur gear for reliable power delivery.
• Performance Tuning Tool — By changing your pinion gear size, you can adjust your overall gear ratio to optimise performance for different conditions—larger pinion gears increase top speed while smaller ones improve acceleration and torque delivery.

Technical Performance

This Traxxas 12-T pinion gear exemplifies the engineering excellence that has made Traxxas the trusted choice for RC enthusiasts across the UK and worldwide. Manufactured from hardened steel or high-strength composite materials (depending on application), the gear teeth are precision-cut to mesh perfectly with Traxxas spur gears, delivering smooth, efficient power transfer from your motor to the wheels. The 32-pitch specification means this gear is designed for models using standard Traxxas drivetrain components, and the 3mm bore accommodates the motor shafts found in most contemporary Traxxas brushless and brushed motor systems. The engineering precision means you won't experience grinding, skipping, or inconsistent performance—critical factors when you're pushing your RC car UK setup to its limits. Whether you're running a high-performance brushless motor system with an advanced ESC, or a traditional brushed setup, this pinion gear integrates seamlessly. The included hardened steel set screw provides positive engagement with your motor shaft, preventing the slippage that can occur with inferior fasteners. For competitive drivers, switching between different pinion gear tooth counts is a standard tuning technique to adapt your setup for specific tracks, weather conditions, and driving preferences. The 12-tooth size represents a balanced middle ground that works excellently for general-purpose driving, track racing, and outdoor bashing scenarios.

What's in the Box

• Traxxas 12-T pinion gear (32-pitch)
• Hardened steel set screw for secure motor shaft installation

Frequently Asked Questions

• What does the tooth count mean and how do I choose the right pinion gear? — The tooth count directly affects your vehicle's gear ratio. A 12-tooth pinion provides balanced acceleration and top speed. If you want more top end speed, choose a larger pinion gear (like 13T or 14T); if you want faster acceleration, choose a smaller one (like 11T or 10T). Consult your Traxxas model's owner's manual for recommended gearing options for your specific vehicle.
• Will this pinion gear work with my Traxxas RC model? — This gear features a 3mm bore and 32-pitch specification, which makes it compatible with most modern Traxxas vehicles. However, you should verify compatibility with your specific model by checking your vehicle's owner's manual or consulting the product specifications. Different Traxxas models may have different drivetrain configurations.
• How do I install the pinion gear? — The pinion gear slides onto your 3mm motor shaft and is secured using the included set screw. The set screw should be tightened firmly but not over-tightened, as excessive force can damage the shaft or strip the threads. Always ensure the gear meshes properly with your spur gear before operating your vehicle.
• Can I use this pinion gear to improve my RC car UK performance? — Yes, changing your pinion gear is one of the most effective tuning methods available. By adjusting the gear ratio, you can optimise acceleration for technical courses, or increase top speed for open terrain. This is a standard technique used by competitive drivers and serious enthusiasts to dial in their setups.
• How often do pinion gears need replacement? — With proper installation and maintenance, Traxxas pinion gears offer excellent durability. Replace the gear if you notice worn teeth, rough engagement with the spur gear, or unusual grinding sounds during operation. Quality components like this typically provide thousands of kilometres of reliable service.
• Is this a genuine Traxxas component? — Yes, the TRX3919 is an official Traxxas part number, ensuring you receive an authentic component engineered and manufactured to the exact specifications required for optimal compatibility and performance.

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 Gear, 12-T pinion (32-pitch)/ set screw TRX3919 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.