ARRMA Pinion Gear 18T 0.8 Module 1/10 4x4 RC Transmission Part AR310758

• Manufacturer: ARRMA
• Model Number: AR310758
• Part Number: Z-AR310758
• EAN Code: 5052127028066
• Part Type: Transmission / Pinion Gear
• Tooth Count: 18T
• Gear Pitch: 0.8 Module
• Bore Diameter: 5mm
• Vehicle Scale: 1/10
• Drive System: 4x4
• Material: Hard-wearing material (suitable for fast and extreme RC driving)
• Included Components: 1 x Pinion Gear (18T 0.8MOD), 1 x M4 x 4mm Set Screw
• Compatible Models: ARRMA 1/10 Granite 3S 4x4 RTR Brushless Monster Truck (Standard Part), ARRMA 1/10 Senton 3S 4x4 RTR Brushless Short Course Truck (Standard Part)
• Precision manufactured gear teeth for smooth operation
• Tooth count moulded into pinion boss for easy identification

Overview

The ARRMA Pinion Gear 18T 0.8mod is an essential transmission component designed for serious RC enthusiasts running ARRMA 4x4 vehicles. Whether you're bashing at high speed or pushing your brushless RC car to its limits, this pinion gear delivers the precise engineering and durability required for extreme RC action. This is a replacement or upgrade component perfect for those looking to fine-tune their RC car UK setup, optimise gearing ratios, or simply replace worn transmission parts after intensive use.

Manufactured from hard-wearing material, this 18-tooth pinion gear is engineered to withstand the demands of fast and extreme RC driving conditions. The 0.8 module specification ensures compatibility with ARRMA's transmission systems, making it an ideal choice for owners of models like the ARRMA 1/10 Granite 3S 4x4 RTR and ARRMA 1/10 Senton 3S 4x4 RTR brushless monsters. Whether you're a weekend basher enjoying high-speed runs or a competitive driver seeking reliable performance, this pinion gear offers the quality and precision that ARRMA is known for across their entire range of ready to run RC vehicles.

As an authorised ARRMA retailer, RC Model Shop stocks genuine OEM components that guarantee compatibility and performance. This pinion gear comes complete with everything you need to install it on your RC car, including the necessary mounting hardware.

Key Features

• Precisely Manufactured Gear Teeth — Each tooth is engineered to exacting tolerances, ensuring smooth meshing with your spur gear and reducing noise, vibration and power loss during operation. Precise manufacturing is critical for maintaining efficiency in your transmission system, particularly important when running brushless motors that demand consistent gear engagement.
• Hard-Wearing Material Construction — Built from durable materials specifically selected for RC applications, this pinion gear resists wear and degradation even during sustained high-speed running and aggressive acceleration. The material choice ensures longevity and reliable performance in both normal and extreme RC driving conditions.
• Strong M4 x 4mm Set Screw — The included high-quality set screw provides secure fastening to your motor shaft, preventing slippage or unwanted rotation that could compromise transmission efficiency and handling. A robust set screw is essential for maintaining consistent gearing during demanding RC sessions.
• Tooth Count Moulded into Boss — The 18-tooth designation is permanently moulded into the pinion boss itself, making size identification quick and easy during maintenance, storage, or when swapping between different gearing setups. This thoughtful design detail helps you identify the correct gear at a glance without consulting documentation.
• 0.8 Module Specification — The 0.8 module pitch ensures perfect compatibility with ARRMA transmission housings and spur gears, maintaining the exact gear ratios your vehicle requires for optimal performance whether you're focusing on top speed or acceleration.
• 5mm Bore — Designed to fit standard ARRMA motor shafts, the 5mm bore provides a secure interface with your brushless or brushed motor setup.

Technical Performance

This 18T 0.8 module pinion gear represents ARRMA's commitment to precision engineering in RC transmission components. The gear is specifically designed for 1/10 scale RC vehicles, particularly the ARRMA Granite 3S 4x4 RTR brushless monster truck and Senton 3S 4x4 RTR brushless short course truck models, though it may be compatible with other ARRMA platforms using the same transmission architecture. The 18-tooth configuration offers a balanced approach to gearing, providing good acceleration characteristics whilst maintaining respectable top-end speed when paired with appropriately sized spur gears. For brushless RC cars, gearing selection is critical to maximising the potential of your electric motor system — too many teeth and you'll sacrifice acceleration, too few and you'll limit top speed and risk over-revving your motor. The 0.8 module pitch is the standard specification across ARRMA's current transmission lineup, ensuring this component will drop straight into your existing vehicle without modification. The hard-wearing material used in construction has been selected specifically to withstand the stresses of high-speed RC driving, resisting the tooth stripping and degradation that can occur with inferior quality gears. Whether you're running on-road or off-road, the precise manufacturing tolerances mean minimal backlash and maximum power transfer from your motor to the wheels. This is a genuine OEM ARRMA component manufactured to the same exacting standards as the components included in ready to run RC models, making it an excellent upgrade or replacement option for enthusiasts serious about maintaining their vehicles at peak performance.

What's in the Box

• 1 x ARRMA Pinion Gear (18T 0.8MOD)
• 1 x M4 x 4mm Set Screw

Frequently Asked Questions

• Is this pinion gear compatible with my ARRMA RC car? — The ARRMA Pinion Gear 18T 0.8mod is listed as a standard part for the ARRMA 1/10 Granite 3S 4x4 RTR brushless monster truck and ARRMA 1/10 Senton 3S 4x4 RTR brushless short course truck. It should also be compatible with other ARRMA 4x4 models using the same 0.8 module transmission specification. Always check your vehicle's manual or contact our team at RC Model Shop to confirm fitment for your specific model.
• What is the difference between different tooth count pinion gears? — Pinion gear tooth count directly affects your vehicle's gearing ratio and performance characteristics. An 18T pinion gear represents a mid-range option — fewer teeth (like 13T or 15T) will increase top speed but reduce acceleration, whilst more teeth (like 20T or 22T) will improve acceleration but cap maximum velocity. The 18T configuration offers a balanced compromise suitable for mixed driving conditions.
• Do I need any tools to install this pinion gear? — Installation requires basic RC tools including a hex key to remove your motor and access the pinion gear, plus tools to tighten the included M4 set screw. If your motor is already removed from your vehicle, installation is straightforward and should take just a few minutes.
• How often will I need to replace my pinion gear? — With proper maintenance and lubrication, an ARRMA pinion gear should last many running sessions. However, if you notice grinding noises, difficulty shifting, or visible tooth damage, it's time to replace it. Regular inspection of your transmission components helps catch wear before failures occur.
• Can I use this with different spur gears to change my gearing? — Yes, by pairing this 18T pinion with different tooth-count spur gears, you can achieve various final drive ratios to optimise performance for different track conditions or driving styles. This flexibility makes upgrading your gearing setup simple and affordable.
• Is this suitable for beginners? — Whilst this is a genuine OEM component suitable for all skill levels, pinion gear replacement is an intermediate maintenance task. Beginners can certainly perform this job with basic RC tools and a little guidance, making it an excellent opportunity to learn about vehicle maintenance and transmission systems.

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 18T 0.8mod: 4x4 Z-AR310758 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.

We want to make sure your delivery goes smoothly, so here are some important details about our service:

• For orders above £120, we offer delivery to most mainland UK addresses. For orders under £120, we can still deliver to Northern Ireland and the outlying isles, as long as the item can be sent by Royal Mail, weighs less than 30kg, and fits within 61cm × 46cm × 46cm. Some highland and remote areas may carry an extra delivery charge as couriers often apply surcharges in these locations. If you live in one of these areas, feel free to contact us before ordering so we can confirm the delivery options and costs for you.
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