Traxxas 18-T Hardened Steel Pinion Gear 32-Pitch RC Motor Component TRX3948X

Overview

The Traxxas 18-T Pinion Gear (32-pitch) Set TRX3948X is an essential replacement component for RC enthusiasts and competitive racers who demand reliability and durability from their RC car UK setups. This hardened steel pinion gear is engineered to withstand the demands of high-performance electric RC vehicles, whether you're bashing at the weekend or competing in organised events. The 18-tooth configuration provides an ideal balance between acceleration and top speed, making it suitable for a wide range of RC applications across popular Traxxas models.

Constructed from premium hardened steel, this pinion gear delivers exceptional wear resistance and longevity compared to standard plastic alternatives. The robust construction ensures consistent performance through countless hours of driving, whether you're tackling outdoor terrain, racing on tracks, or enjoying casual backyard sessions with your brushless RC car. For UK RC hobbyists seeking reliable replacement parts and upgrade components, the TRX3948X represents genuine Traxxas quality at an affordable price point.

This pinion gear is the perfect choice for owners of modern Traxxas brushless RC vehicles including the Rustler Ultimate VXL 4x4, TRX-4 2021 Ford Bronco crawler, and TRX-4 Defender. Whether you're looking to replace a worn gear, upgrade from stock components, or fine-tune your gear ratio for different driving conditions, this precision-engineered part will help you maintain peak performance and reliability from your investment.

Key Features

• Hardened Steel Construction — The pinion gear is manufactured from hardened steel rather than plastic or softer metals, which dramatically increases its durability and resistance to stripping, cracking and premature wear even under extreme racing conditions and high-speed driving.
• 18-Tooth Configuration — The 18-tooth design provides an excellent compromise between acceleration response and top speed capability, making it versatile enough for both track racing and general bashing without sacrificing performance in either direction.
• 32-Pitch Specification — The 32-pitch gear pitch ensures compatibility with Traxxas transmission systems and spur gears, allowing you to correctly mesh with your vehicle's drivetrain for smooth, efficient power transfer without grinding or slippage.
• Set Screw Mounting — The integrated set screw allows secure fastening directly onto your motor shaft, preventing unwanted rotation or slipping that could otherwise result in loss of power delivery and poor acceleration response during high-demand driving.
• 3.2mm Bore Diameter — The precisely machined 3.2mm bore diameter is engineered to fit snugly onto standard Traxxas motor shafts, ensuring a tight mechanical fit that maximises torque transmission and minimises vibration during operation.
• Genuine Traxxas Component — As an official Traxxas replacement part, this pinion gear meets the manufacturer's exacting quality standards and engineering specifications, guaranteeing compatibility and reliability with your Traxxas RC vehicle.
• Wide Vehicle Compatibility — This single pinion gear is compatible with multiple popular Traxxas models including the Rustler Ultimate VXL 4x4 in green and blue, the TRX-4 2021 Ford Bronco in orange, black, red and white, and the TRX-4 Defender in green, sand, red and silver variants.

Technical Performance

The Traxxas 18-T Pinion Gear demonstrates exceptional engineering in its design and manufacture. The hardened steel material undergoes specialised treatment to achieve superior hardness and durability compared to standard plastic or cast metal alternatives commonly found in budget RC components. This material science approach means the gear maintains its tooth profile and engagement characteristics even after thousands of drive cycles and mesh engagements with the spur gear. The 32-pitch specification is a precision standard used across the Traxxas ecosystem, ensuring this pinion will mesh cleanly and efficiently with genuine Traxxas spur gears without binding, slipping or excessive backlash. The 3.2mm bore is precisely toleranced to fit Traxxas motor shafts with minimal runout, which is critical for reducing vibration and maximising the transfer of motor torque directly to the wheels. The set screw provides a mechanical lock that prevents the gear from rotating independently on the motor shaft during acceleration or deceleration, maintaining the fixed gear ratio you've selected. For owners of brushless RC vehicles, this pinion gear works seamlessly with high-KV brushless motors to deliver responsive acceleration whilst maintaining smooth power delivery at speed. The 18-tooth count positions this gear as a mid-range option; selecting this size allows drivers to optimise performance based on their specific track layout, driving style and battery configuration, whether running 2S or 3S LiPo packs in their Traxxas brushless models.

What's in the Box

• Traxxas 18-T Hardened Steel Pinion Gear (32-pitch)
• Set Screw for secure mounting

Frequently Asked Questions

• Which Traxxas RC cars is this 18-T pinion gear compatible with? — The TRX3948X pinion gear is designed for use with multiple Traxxas models including the Rustler Ultimate VXL 4x4 brushless truck available in green and blue, the TRX-4 2021 Ford Bronco 1/10 crawler available in orange, black, red and white, and the TRX-4 Defender 4WD RTR available in green, sand, red and silver. If you own any of these Traxxas brushless or electric RC vehicles and need a replacement pinion gear or want to adjust your gear ratio, this part is an excellent choice.
• Why would I need to replace or change my pinion gear? — Pinion gears can wear over time with regular use, or teeth may strip if you drive through water or experience mechanical shock. Additionally, changing your pinion gear size is a common tuning method used by RC racers to adjust their top speed and acceleration balance. For example, switching from a 17-tooth to an 18-tooth pinion will slightly increase top speed whilst reducing acceleration slightly, or vice versa with a 16-tooth option.
• Is this a genuine Traxxas part or an aftermarket replacement? — This is an official genuine Traxxas OEM (Original Equipment Manufacturer) replacement part carrying the authentic TRX3948X model number, ensuring you receive the exact quality and specifications Traxxas designed for your vehicle. When you purchase from authorised Traxxas retailers, you can be confident you're receiving a genuine component rather than an imitation or counterfeit product.
• How do I install this pinion gear on my RC car? — To install the pinion gear, remove your motor from the motor compartment and slide the gear onto the motor shaft. Align the set screw hole with your preferred position on the shaft, then tighten the set screw firmly using an appropriate hex key to lock the gear in place. Ensure the gear meshes correctly with your spur gear before reassembling your vehicle. Most RC hobbyists can complete this task in just a few minutes using basic tools.
• What is the difference between the 17T, 18T and other pinion gear options? — Traxxas offers pinion gears in several tooth counts (13T, 14T, 16T, 17T, 18T and higher). A lower tooth count (like 13T or 14T) increases acceleration but reduces top speed, whilst a higher tooth count (like 18T or 19T) increases top speed but reduces acceleration response. The 18T represents a balanced middle ground suitable for mixed-use driving, whereas serious racers often experiment with different sizes to optimise performance for their specific track or course layout.
• Is this gear suitable for high-speed brushless RC cars? — Yes, this hardened steel pinion gear is perfectly suited for use with brushless RC vehicles including the Traxxas Rustler Ultimate VXL and TRX-4 models listed in the compatibility section. The hardened steel construction is specifically engineered to handle the high torque and rapid engagement demands of modern brushless motors and ESCs without stripping or premature wear.

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 18-T Pinion Gear (32-pitch) Set TRX3948X 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.