Traxxas 18-Tooth Pinion Gear 0.8 Metric Pitch 32-Pitch 5mm Shaft TRX5644

Overview

The Traxxas 18-T Pinion Gear (TRX5644) is an essential replacement component for RC enthusiasts running Traxxas electric models, particularly the popular Stampede 4X4 HD VXL series. This precision-engineered pinion gear is designed to fit a 5mm shaft and features 18 teeth with 0.8 metric pitch specifications, making it fully compatible with 32-pitch systems. Whether you are maintaining your RC car UK collection, upgrading your transmission setup, or simply replacing worn components from regular bashing sessions, this genuine Traxxas pinion gear delivers the reliability and performance that serious RC hobbyists demand.

Pinion gears are critical drivetrain components that transfer power from your motor to the main transmission system, directly affecting acceleration, top speed, and overall performance characteristics of your ready to run RC vehicle. Choosing the correct pinion tooth count allows you to fine-tune your model's gearing ratio to suit your driving style, track conditions, and performance goals. With the right pinion selection, you can optimise your brushless RC car's performance, whether you prefer high-speed thrills or improved acceleration and torque delivery for challenging terrain.

This OEM Traxxas component is manufactured to strict quality standards using premium materials and precision machining, ensuring smooth engagement with your spur gear and reliable long-term operation even under demanding driving conditions. RC car UK owners trust Traxxas for dependable replacement parts that maintain the integrity and performance of their investment.

Key Features

• 18-Tooth Configuration — The 18-tooth pinion design provides a specific gear ratio that influences your RC model's acceleration and top speed characteristics, allowing you to optimise performance for your particular driving conditions and preference between speed and torque delivery.
• 5mm Shaft Bore — The 5mm shaft compatibility ensures this pinion gear fits securely onto the motor shafts of compatible Traxxas models, providing positive engagement and preventing slippage during aggressive acceleration or high-torque situations.
• 0.8 Metric Pitch Specification — The 0.8 metric pitch (equivalent to 32-diametral pitch) is the standard specification for these Traxxas transmission systems, guaranteeing perfect meshing and smooth power transfer without binding or excessive backlash.
• 32-Pitch Compatibility — Full compatibility with 32-pitch transmission components means this pinion will work seamlessly with your existing Traxxas drivetrain without requiring additional modifications or adaptations.
• Genuine Traxxas Component — As an authentic OEM Traxxas part, this pinion gear is engineered to exact specifications and manufactured using the same quality standards as the original equipment, ensuring reliability and longevity.
• Precision Machined Construction — The tooth profile and bore are precision machined to tight tolerances, delivering smooth engagement with your spur gear and minimising wear on drivetrain components during operation.

Technical Performance

The Traxxas 18-T Pinion Gear represents precision engineering designed specifically for 1/10 scale brushless RC monster trucks and similar electric RC vehicles. With an 18-tooth count, this pinion gear establishes a gear ratio that directly influences how your motor's rotational energy translates into vehicle acceleration and top speed. The 0.8 metric pitch specification is the industry standard for Traxxas transmission systems, ensuring that this component meshes perfectly with compatible spur gears without any play, binding, or premature wear. The 5mm shaft bore is machined to precise tolerances, allowing the pinion to slide onto your motor shaft with a secure fit that prevents slippage under high-torque acceleration or during aggressive driving manoeuvres. Traxxas engineers these components using hardened steel or advanced composite materials designed to withstand the substantial forces generated by modern brushless motors with high KV ratings. The tooth profile features carefully designed geometry that promotes smooth power delivery and reduces drivetrain noise while minimising wear on both the pinion and mating spur gear. Whether you are operating your RC car UK in high-performance racing scenarios, weekend bashing sessions, or general recreational driving, this pinion gear will provide consistent, reliable performance. Regular replacement of worn pinion gears is a critical maintenance task that preserves overall transmission efficiency and prevents catastrophic drivetrain failure.

What's in the Box

• Traxxas 18-T Pinion Gear (0.8 metric pitch, 32-pitch compatible)

Frequently Asked Questions

• What Traxxas models is this pinion gear compatible with? — This pinion gear (TRX5644) is compatible with the Traxxas Stampede 4X4 HD VXL range, including the orange, blue, and green variants (model numbers TRX90376-4-ORNG, TRX90376-4-BLUE, and TRX90376-4-GRN). These are 1/10 scale 4WD ready to run brushless electric monster trucks, and this pinion fits their drivetrain perfectly.
• When should I replace my pinion gear? — Pinion gears experience wear over time through repeated engagement with the spur gear, particularly if you drive frequently or in abrasive conditions. Signs that replacement is needed include noticeable drivetrain noise, loss of efficiency, or visible tooth damage. Regular inspection during maintenance intervals is recommended, and many RC enthusiasts replace pinion gears as part of preventative maintenance.
• How does pinion tooth count affect performance? — Pinion tooth count directly determines your vehicle's gear ratio. An 18-tooth pinion is considered a mid-range option that balances acceleration and top speed. Lower tooth counts (fewer teeth) create a taller gear ratio for higher top speed but reduced acceleration, whilst higher tooth counts create a shorter ratio with quicker acceleration but lower maximum speed. The 18-tooth configuration provides a versatile setup suitable for mixed driving styles.
• Is this suitable for beginners? — Yes, this is an OEM replacement component suitable for anyone maintaining or upgrading a compatible Traxxas Stampede 4X4 HD VXL. However, pinion gear installation typically requires basic mechanical knowledge and appropriate tools. If you are uncertain about installation, our team at RC Model Shop can provide guidance or assistance.
• What pitch specification should I look for? — This pinion features 0.8 metric pitch, which is the standard for these Traxxas transmission systems. The 32-pitch designation (equivalent specification) confirms compatibility with your existing drivetrain. Always match the pitch specification when selecting replacement gears to ensure proper meshing and performance.
• Can I use different tooth counts for different driving conditions? — Yes, many RC enthusiasts maintain multiple pinion gears with different tooth counts (such as 16T, 18T, or 20T) to optimise performance for different scenarios. Track racing might benefit from a 16T pinion for higher speed, whilst bash sessions on mixed terrain might favour an 18T or 20T for improved acceleration and torque. Having multiple options allows you to fine-tune your setup.

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 (0.8 metric pitch, compatible with 32-pitch) Set (fits 5mm shaft) TRX5644 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.