Traxxas 15-T Pinion Gear 32 Pitch Hardened Steel with Set Screw TRX3945X

Overview

The Traxxas 15-T Pinion Gear (32-pitch) Set TRX3945X is an essential replacement component for RC enthusiasts and serious bashers who demand reliability and performance from their electric RC vehicles. This heavy-duty pinion gear is engineered to deliver consistent power transfer and exceptional durability, making it the ideal choice for anyone running Traxxas RC cars in the UK or across Europe. Whether you're a weekend basher pushing your RC monster truck to the limit, a competitive racer fine-tuning your setup, or a dedicated hobbyist maintaining your RC collection, this replacement pinion gear ensures your vehicle stays in peak operating condition.

Manufactured by Traxxas, the world-leading authority in RC vehicles and components, this 15-tooth pinion gear is constructed from hardened steel and precision-engineered to exacting standards. The heavy-duty construction means it can withstand the demands of aggressive driving, high-speed runs, and challenging terrain without premature wear or failure. Fitting a 3.2mm bore, this pinion gear is compatible with a wide range of Traxxas brushless RC trucks and crawlers, as well as select Team Associated models, making it an incredibly versatile spare part to keep in your toolbox.

When you need reliable RC parts that work first time, every time, the Traxxas 15-T Pinion Gear delivers the performance and longevity that RC drivers across the UK have trusted for decades. The inclusion of a set screw ensures secure attachment to your motor shaft, preventing any slippage during high-torque acceleration or challenging driving conditions.

Key Features

• Heavy-Duty Hardened Steel Construction — This pinion gear is manufactured from hardened steel, which provides exceptional durability and resistance to wear, ensuring it will perform reliably through countless driving sessions without becoming damaged or degraded, even under the most demanding driving conditions.
• Precision 32-Pitch Specification — The 32 diametral pitch (32dp) specification ensures precise meshing with your spur gear, delivering smooth power delivery and minimising drivetrain noise whilst maximising efficiency in your RC vehicle's transmission system.
• 15-Tooth Design — The 15-tooth configuration provides an excellent balance between acceleration and top speed, making this gear suitable for both speed-focused builds and torque-hungry crawlers, depending on your spur gear selection.
• Set Screw Included — The integrated set screw provides a secure mechanical lock to your motor shaft, preventing any unwanted gear slippage during acceleration, deceleration, or challenging off-road driving situations.
• 3.2mm Bore Diameter — Engineered to fit standard 3.2mm motor shafts, this bore size is compatible with the vast majority of modern Traxxas brushless motors and many aftermarket alternatives, making replacement straightforward and hassle-free.
• Broad Vehicle Compatibility — This genuine Traxxas component is compatible with numerous models including the Rustler Ultimate VXL, Slash Ultimate and Standard VXL variants, TRX-4 crawlers, and select Team Associated MT10 models, making it a smart investment for multi-vehicle RC enthusiasts.
• OEM Traxxas Quality — As a genuine Traxxas part manufactured to factory specifications, you can be confident that this pinion gear meets the same exacting standards as the gears originally installed in your RC vehicle at the factory.

Technical Performance

The Traxxas 15-T Pinion Gear (32-pitch) is engineered from hardened steel to provide exceptional durability and longevity in demanding RC applications. With a 3.2mm bore, it meshes seamlessly with Traxxas spur gears in their extensive range of 1/10-scale brushless RC trucks, including the legendary Rustler Ultimate VXL 4x4, Slash Ultimate 4x4 VXL short course trucks, and the comprehensive TRX-4 crawler lineup. The 32-pitch specification (2.54mm module) ensures precision tooth engagement with minimal backlash, critical for efficient power delivery from brushless motors rated at various KV ratings. The 15-tooth count provides a versatile middle-ground gear ratio suitable for both acceleration-focused setups when paired with larger spur gears, and speed-optimised configurations when combined with smaller spur options. The included set screw provides mechanical retention to motor shafts, preventing any gear slip during high-torque situations such as climbing steep terrain or launching from stationary positions. Whether you're operating 3S, 4S, or higher LiPo batteries powering the latest Hobbywing brushless ESC systems, this pinion gear delivers consistent meshing and smooth drivetrain operation across the entire performance envelope. The hardened steel material withstands the repetitive impact loads inherent in aggressive RC bashng and competitive racing, making it an excellent value replacement component for active RC enthusiasts in the UK who demand reliability without compromise.

What's in the Box

• Traxxas 15-T Pinion Gear (32-pitch) with integrated set screw

Frequently Asked Questions

• What Traxxas RC vehicles is this 15-tooth pinion gear compatible with? — This TRX3945X pinion gear fits a wide range of Traxxas brushless RC models, including the Rustler Ultimate VXL 4x4 (available in green and blue variants), Slash Ultimate 4x4 VXL and Slash VXL short course trucks (in orange, blue, green and red colours), and the entire TRX-4 crawler range including the Chevrolet K10 Cheyenne, Ford F-150 Ranger XLT, 1972 Chevrolet K5 Blazer, 1979 Chevy Blazer, Nissan Pathfinder, 2021 Ford Bronco, Defender, and Sport models. It's also compatible with Team Associated MT10 models including the Brushless RTR Truck V2, Classic Truck Builders Kit, and Factory Team Kit variants.
• What is the bore size of this pinion gear and how do I install it? — The bore diameter is 3.2mm, which fits standard Traxxas brushless motor shafts. Installation is straightforward: slide the gear onto your motor shaft and tighten the included set screw firmly using an appropriate hex key to prevent any movement during operation. Ensure the set screw contacts the flat machined into your motor shaft for optimal retention.
• Is this a genuine Traxxas part or a clone? — This is a genuine OEM Traxxas part (model number TRX3945X, EAN 0020334394590) manufactured to factory specifications. Using genuine Traxxas components ensures compatibility, durability, and performance consistency with your RC vehicle. Many RC drivers in the UK and beyond trust Traxxas genuine parts for reliability and longevity.
• Why do I need to replace my pinion gear? — Pinion gears experience wear over time through thousands of drivetrain cycles, especially in aggressive RC bashing or competitive racing scenarios. Worn gears develop pitting, chipping, or tooth damage that causes drivetrain noise, inefficiency, and potential complete failure. Replacing a worn pinion gear with a fresh Traxxas unit restores smooth, silent operation and ensures reliable power delivery. A worn pinion may skip or slip under heavy throttle, so replacement ensures predictable vehicle behaviour.
• What is the tooth count of this gear and why does it matter? — This pinion gear has 15 teeth, which works in combination with your spur gear to determine your vehicle's overall gear ratio. The 15-tooth configuration provides a balanced middle point: pair it with larger spur gears for maximum acceleration and torque (ideal for crawling and rough terrain), or combine it with smaller spur gears for higher top speed (suitable for open-track running and speed runs). The specific ratio you choose should match your intended use and desired performance characteristics.
• What does 32-pitch mean and how does it affect performance? — The 32-pitch specification refers to the diametral pitch, a standard gear measurement system. A 32-pitch (32dp) gear has finer, more closely-spaced teeth compared to coarser pitches like 48-pitch, resulting in smoother meshing with your spur gear, reduced drivetrain noise, and more efficient power transfer. The precision pitch specification ensures your pinion gear meshes correctly with Traxxas spur gears, preventing wear and maintaining consistent performance throughout your RC vehicle's operational life.
• Is this pinion gear suitable for beginners? — Yes, absolutely. This is a straightforward replacement component that any RC enthusiast can install in minutes with basic tools. If you're a beginner and your RC vehicle's drivetrain is making noise or feels less responsive than usual, a worn pinion gear may be the culprit. Traxxas genuine parts are designed to be user-friendly, and this gear installation requires only removal of the old gear, installation of the new unit, and tightening the set screw. No special knowledge or experience is required.

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 15-T Pinion Gear (32-pitch) Set TRX3945X 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.