ARRMA Pinion Gear 15T 0.8 Module RC 4x4 Transmission AR310424

• Manufacturer: ARRMA
• Model Number: AR310424
• Part Type: Pinion Gear
• Tooth Count: 15 teeth
• Gear Pitch: 0.8 module
• Bore Diameter: 5mm
• Material: Hard-wearing composite material
• Included Set Screw: M4 x 4mm
• Compatible Vehicles: ARRMA 1/10 Big Rock 3S 4x4 RTR Brushless Monster Truck, ARRMA 1/10 Granite 3S 4x4 RTR Brushless Monster Truck, ARRMA 1/10 Senton 3S 4x4 RTR Brushless Short Course Truck, ARRMA 1/8 Typhon 3S 4x4 RTR Brushless Buggy
• Features: Precisely manufactured gear teeth, strong set-screw, tooth count moulded into pinion boss for easy identification
• EAN: 5052127028042

Overview

The ARRMA Pinion Gear 15T 0.8mod is an essential transmission component designed for high-performance RC 4x4 vehicles that demand reliability and precision during intense driving sessions. This pinion gear is manufactured from hard-wearing material engineered to deliver perfect gear operation when the action is fast and extreme, making it an ideal choice for RC enthusiasts across the UK who run brushless 4WD monster trucks, buggies, and short course trucks. Whether you're a seasoned basher or upgrading your existing RC 4x4 setup, this genuine ARRMA component ensures smooth power delivery and consistent performance on the track or off-road terrain.

Built to exacting standards by ARRMA, a leading manufacturer of high-quality RC vehicles and replacement parts, this 15-tooth pinion gear is specifically engineered for compatibility with multiple ARRMA 1/10 and 1/8 scale 4x4 models including the Big Rock 3S, Granite 3S, Senton 3S, and Typhon 3S platforms. The 0.8 module specification represents a critical gear pitch measurement that ensures optimal meshing with your vehicle's spur gear, translating to efficient power transfer, reduced drivetrain noise, and extended component lifespan. For RC car UK enthusiasts looking to maintain or upgrade their brushless RC 4WD vehicles, selecting genuine OEM parts like this pinion gear is crucial for reliability and performance consistency.

RC transmission components such as pinion gears are among the most frequently replaced parts in high-performance ready to run RC vehicles and race kits, particularly when running brushless systems that deliver high torque outputs. The 15-tooth configuration offers a balance between acceleration and top-end speed, making this gear suitable for mixed-terrain driving rather than pure speed runs. Keeping spare pinion gears in your RC tool kit is considered best practice by experienced RC hobbyists, as even minor wear or damage can be immediately replaced to minimise downtime and maintain consistent performance during competitive events or casual weekend bashing sessions.

Key Features

• Precisely Manufactured Gear Teeth — Every tooth on this pinion gear is manufactured to exacting tolerances, ensuring smooth meshing with the spur gear for efficient power delivery, reduced noise during operation, and minimised vibration that could otherwise affect handling and traction in your RC 4x4.
• Hard-Wearing Material Construction — The gear is formed from durable material specifically selected to withstand the extreme forces generated by brushless motors and high-speed driving, providing longevity and reliability even during intense competitive racing or aggressive weekend bashing.
• Strong Set-Screw Included — This pinion gear comes with a dedicated M4 x 4mm set screw designed to securely fasten the gear to your motor shaft, preventing slippage under load and ensuring consistent power delivery throughout your driving session.
• Tooth Count Moulded into Pinion Boss — The tooth count is clearly marked directly on the gear itself, allowing for instant size recognition when sorting spares, maintaining your vehicle, or configuring different gear ratios for various driving conditions and track layouts.
• OEM ARRMA Component — This is a genuine original equipment manufacturer part, meaning it is designed and approved for use with specific ARRMA 4x4 models, guaranteeing perfect fitment and eliminating any compatibility concerns.
• Optimised 0.8 Module Pitch — The 0.8 module specification represents the gear pitch, which directly affects the ratio and compatibility with your vehicle's transmission; this standard pitch is used across multiple ARRMA platforms for consistency and reliability.

Technical Performance

The ARRMA Pinion Gear 15T 0.8mod represents precision engineering in the RC transmission category, delivering the performance characteristics required by modern brushless RC 4WD vehicles. With 15 teeth and a 0.8 module pitch, this gear is engineered to mesh perfectly with ARRMA spur gears, resulting in smooth power delivery, minimal backlash, and efficient energy transfer from the brushless motor to the drivetrain. The hard-wearing material selected for this component is formulated to withstand the extreme torque outputs characteristic of 3S LiPo-powered brushless systems found in ready to run RC trucks and buggies. The precisely manufactured teeth profiles ensure consistent meshing action, which translates directly to reduced drivetrain wear, quieter operation, and improved traction control. This pinion gear is compatible with multiple ARRMA platforms including 1/10 scale models such as the Big Rock 3S 4x4 RTR brushless monster truck, Granite 3S 4x4 RTR brushless monster truck, Senton 3S 4x4 RTR brushless short course truck, and 1/8 scale models such as the Typhon 3S 4x4 RTR brushless buggy. The 5mm bore diameter is the standard size for ARRMA motor shafts, and the supplied M4 x 4mm set screw ensures rock-solid fastening that prevents any gear slippage during aggressive acceleration or high-speed cornering. Replacement intervals for pinion gears depend on driving intensity and conditions; competitive racers typically replace them more frequently than casual weekend bashers, making it wise to stock spare gears in your RC maintenance kit.

What's in the Box

• 1 x Pinion Gear 15T 0.8MOD
• 1 x M4 x 4mm Set Screw

Frequently Asked Questions

• What ARRMA vehicles is this 15T pinion gear compatible with? — This pinion gear is compatible with multiple ARRMA 4x4 models including the 1/10 Big Rock 3S, Granite 3S, and Senton 3S brushless monster and short course trucks, as well as the 1/8 Typhon 3S 4x4 RTR brushless buggy. Always verify your specific model before ordering to ensure proper fitment.
• What does the 0.8 module specification mean and why does it matter? — Module refers to the pitch of the gear teeth; 0.8 module is a standard pitch used across ARRMA 4x4 platforms. This specification determines how the pinion gear meshes with your spur gear, affecting efficiency, noise levels, and durability. Using the correct module is essential for proper transmission operation.
• How often should I replace my pinion gear? — Replacement frequency depends on your driving style and conditions. Competitive racers may replace pinion gears frequently as part of regular maintenance, whilst casual bashers might use the same gear for extended periods. Inspect regularly for tooth wear, chipping, or damage, and replace immediately if damage is detected to avoid further drivetrain damage.
• What is the 15-tooth ratio used for? — The 15-tooth pinion gear provides a mid-range gear ratio offering balanced acceleration and top-end speed, making it suitable for mixed-terrain driving. Lower tooth counts increase top speed but reduce acceleration, whilst higher tooth counts improve acceleration but limit maximum speed. Choose based on your preferred driving terrain and style.
• Is this gear suitable for beginners? — Yes, this is a standard replacement component suitable for RC enthusiasts of all experience levels. If you're new to RC transmission maintenance, this is an excellent opportunity to learn about drivetrain components and basic gear installation using the included set screw.
• Will this pinion gear work with my 3S LiPo battery system? — Yes, this pinion gear is compatible with brushless RC 4x4 vehicles powered by 3S LiPo batteries, which are standard for most modern ready to run ARRMA trucks and buggies. The gear itself is battery-agnostic; compatibility depends on the vehicle platform, not the battery type.
• What is the difference between this 15T gear and other tooth counts? — ARRMA offers pinion gears in various tooth counts including 13T and 18T options. The 15T provides mid-range performance; 13T gears increase top speed for faster vehicles, whilst 18T gears improve acceleration for vehicles prioritising grunt and torque delivery.

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 Pinion Gear 15T 0.8mod: 4x4 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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