ARRMA Pinion Gear 13 Tooth 0.8 Module 5mm Bore RC Z-AR310425

• Brand: ARRMA
• Model Number: Z-AR310425
• Product Type: Pinion Gear
• Tooth Count: 13 teeth
• Gear Module: 0.8 mod
• Bore Diameter: 5mm
• Material: Hard-wearing composite
• Set Screw Included: M4 x 4mm
• Set Screw Material: Steel
• Tooth Design: Custom manufactured gear teeth
• Identification: Tooth count moulded into pinion boss
• Application: ARRMA 4x4 RC vehicles
• EAN Code: 5052127028059

Overview

The ARRMA Pinion Gear 13T, 5mm, 0.8 module is a precision-engineered component designed for serious RC enthusiasts and competitive racers across the UK who demand reliability and performance from their RC cars. This is a genuine ARRMA replacement part manufactured to exacting standards, ensuring perfect gear operation even when the action is fast and extreme. Whether you're running a high-performance 4x4 RC buggy, a monster truck, or any other ARRMA RC vehicle, having the correct pinion gear is essential for maintaining optimal drivetrain efficiency and protecting your investment.

Pinion gears are critical components in the drivetrain of any RC car, directly affecting acceleration, top speed, and overall performance characteristics. By selecting the correct tooth count, you can fine-tune your RC vehicle's performance to suit your driving style and racing conditions. The 13-tooth configuration offered here is a popular choice for drivers seeking a balance between acceleration and top speed, making it suitable for a wide range of driving environments from track racing to off-road bashings. This premium ARRMA pinion gear is the ideal upgrade or replacement for RC car UK enthusiasts who take their hobby seriously.

Built from hard-wearing material specifically chosen for durability and precision, this pinion gear delivers consistent performance lap after lap, race after race, and bash session after bash session. ARRMA's reputation for quality and reliability extends to every component they manufacture, and this pinion gear is no exception. Whether you're replacing a worn gear or optimising your RC car's gearing for a specific track or terrain, you can trust this genuine ARRMA part to perform.

Key Features

• 13-Tooth Configuration — The 13-tooth pinion gear offers an excellent balance between acceleration and top speed, making it a versatile choice for drivers who want responsive acceleration without sacrificing overall velocity. This tooth count is ideal for mixed terrain driving and competitive racing on various track layouts.
• 0.8 Module Pitch — The 0.8 module specification ensures precise meshing with ARRMA's spur gears and drivetrain components, guaranteeing smooth power transfer and minimising gear whine and drivetrain stress. This standardised module means perfect compatibility with ARRMA's ecosystem of gears and components.
• 5mm Bore Diameter — The 5mm bore is engineered to fit securely onto ARRMA motor shafts and drive systems, providing a reliable connection that won't slip under acceleration or extreme driving conditions. This dimension is critical for ensuring proper power transmission and preventing gear failure during high-speed runs.
• Hard-Wearing Material Construction — Manufactured from durable composite material designed specifically for RC applications, this pinion gear resists wear, stripping, and damage during intense driving. The material choice ensures longevity and maintains gear tooth integrity even under extreme loads and continuous high-RPM operation.
• Custom Manufactured Gear Teeth — Each tooth is precision-molded to exact specifications, ensuring smooth engagement with your spur gear and delivering consistent performance. Custom manufacturing eliminates the imperfections found in lower-quality aftermarket gears, resulting in quieter, smoother operation and better power delivery.
• Tooth Count Moulded Into Boss — The gear size is clearly moulded directly into the pinion boss, making it instantly recognisable and eliminating any confusion when identifying gears in your spares box. This practical feature is invaluable when maintaining multiple RC vehicles or managing gear inventories.
• Strong Set-Screw Included — A precision M4 x 4mm set screw is included in the package, engineered to securely fasten the pinion gear onto your motor shaft. The set-screw design prevents unwanted gear slippage during acceleration and cornering, ensuring reliable power transmission every time you hit the throttle.

Technical Performance

This ARRMA Pinion Gear 13T represents the pinnacle of drivetrain engineering for 1/10 scale 4x4 RC vehicles. The 0.8 module pitch is a standard specification across ARRMA's range of gears, ensuring perfect compatibility with spur gears designed to the same specification. The 5mm bore diameter accommodates standard ARRMA motor shafts, providing a secure and repeatable mounting solution. The hard-wearing material used in construction has been specifically formulated to withstand the extreme stresses encountered during high-speed acceleration, cornering, and sustained high-RPM operation. The custom-manufactured gear teeth deliver smooth, efficient power transfer with minimal backlash and noise. This is not a generic aftermarket gear — it is a genuine ARRMA component engineered to the same exacting standards as the rest of your vehicle's drivetrain. Whether you're running brushless or brushed motors, racing on track or bashing off-road, this pinion gear will deliver reliable performance and maintain your vehicle's optimal gearing ratio. The inclusion of the M4 x 4mm set screw means you have everything needed for installation straight out of the box, with no need to source additional fasteners.

What's in the Box

• 1x ARRMA Pinion Gear 13T, 0.8 module
• 1x M4 x 4mm Set Screw for secure fastening

Frequently Asked Questions

• What is a pinion gear and why do I need to replace it? — A pinion gear is a small toothed gear mounted on your motor shaft that drives the larger spur gear in your drivetrain. Over time, pinion gears can wear, strip, or break due to repeated acceleration and extreme driving conditions. Replacing a worn pinion gear restores optimal performance and prevents further damage to your drivetrain. The tooth count also determines your vehicle's final gear ratio, so changing the pinion can fine-tune your RC car's acceleration and top speed characteristics.
• How does the 13-tooth configuration affect my RC car's performance? — The 13-tooth pinion gear sits in the middle range of tooth counts, offering a balanced ratio between acceleration and top speed. Fewer teeth (like 12T) provide faster acceleration but lower top speed, whilst more teeth (like 14T) deliver higher top speed but reduced acceleration. The 13T is ideal for drivers who want responsive acceleration without completely sacrificing overall velocity, making it perfect for mixed terrain driving and recreational use.
• Is this pinion gear compatible with my ARRMA RC vehicle? — Yes, the ARRMA Pinion Gear 13T, 5mm bore, 0.8 module is designed as a genuine ARRMA replacement part. It is compatible with ARRMA 4x4 RC vehicles and any other ARRMA models that use 0.8 module gears with 5mm motor shaft bores. Always verify your vehicle's specifications before purchasing to ensure compatibility, as different ARRMA models may use different gear modules and bore diameters.
• What is the difference between 0.8 module and other module specifications? — Module is a measurement that defines the size and spacing of gear teeth. Different module gears cannot be mixed — a 0.8 module pinion must mesh with a 0.8 module spur gear. Using mismatched modules will result in poor meshing, excessive noise, rapid wear, and potential drivetrain failure. Always ensure your replacement pinion matches the module specification of your existing spur gear and drivetrain components.
• Do I need to replace my spur gear as well? — Not necessarily. If your spur gear is in good condition and undamaged, you can simply replace the worn or damaged pinion gear. However, if both gears show signs of wear or damage, it is recommended to replace both simultaneously to ensure smooth operation and optimal longevity. Mixing a new pinion with a heavily worn spur gear, or vice versa, can result in uneven wear and premature failure of the new component.
• How do I install the pinion gear onto my motor shaft? — The pinion gear slides onto your motor shaft and is secured using the included M4 x 4mm set screw. Align the gear so the teeth are perpendicular to the shaft, position the set screw through the pinion boss and into the motor shaft, and tighten firmly using a suitable hex key. Ensure the set screw is tight enough to prevent any slippage but do not over-tighten, as this can strip the screw or damage the motor shaft. Always consult your vehicle's manual for specific installation instructions.
• Is this suitable for beginners? — Whilst this is a genuine ARRMA component suitable for any user, pinion gear replacement and drivetrain tuning are intermediate-level maintenance tasks. Beginners should ensure they have a proper set of hex keys, understand their vehicle's drivetrain layout, and ideally have some experience with basic RC car maintenance. If you are new to RC cars, we recommend consulting your vehicle's manual or seeking guidance from experienced RC enthusiasts at your local club or hobby shop.
• How often should I replace my pinion gear? — Pinion gear lifespan depends on driving intensity, frequency, surface conditions, and maintenance habits. Regular drivers may find their pinion gears last several months to a year with proper care. Competitive racers or extreme bashers may need to replace gears more frequently. Inspect your pinion regularly for signs of wear, stripping, or tooth damage. Replace immediately if you notice any of these issues, or if your vehicle exhibits sudden changes in acceleration, noise, or vibration.
• What makes ARRMA pinion gears different from generic aftermarket alternatives? — ARRMA pinion gears are precision-manufactured to exacting standards using specially formulated durable materials. Each gear tooth is custom-moulded rather than simply stamped or injection-moulded, resulting in superior mesh characteristics, reduced noise, and enhanced durability. Generic aftermarket gears may be cheaper initially but often result in poor performance, rapid wear, and potential drivetrain damage. Investing in genuine ARRMA components ensures reliability, optimal performance, and long-term value for money.

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 ARRMA Pinion Gear 13T, 5mm, 0.8mod 4x4 Z-AR310425 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.

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