- Brand: ARRMA
- Model Number: Z-AR310021
- EAN: 5052127001113
- Part Type: Drivetrain Spares
- Gear Type: Spur Gear
- Tooth Count: 81 teeth
- Pitch: 48P (48-pitch)
- RRP: £6.99
Overview
The ARRMA Spur Gear 48P 81T Z-AR310021 is an essential drivetrain spare part designed for ARRMA RC models. Whether you're a dedicated RC car UK enthusiast, a weekend basher, or someone looking to maintain and upgrade their brushless RC vehicle, this spur gear is a critical component for reliable performance. Spur gears are central to the power transmission system in RC cars, directly affecting acceleration, top speed, and overall drivetrain efficiency. When your existing gear shows signs of wear or damage, replacing it with a genuine ARRMA spare ensures your RC model continues to perform at its best.
This 81-tooth spur gear with 48-pitch specification is engineered to precise tolerances and manufactured to ARRMA's quality standards. As a drivetrain spare, it plays a vital role in transferring power from your brushless motor to the wheels, making it one of the most important components in your RC setup. For anyone serious about maintaining their RC car or looking to optimise their vehicle's performance characteristics, having the correct replacement gears on hand is essential. The Z-AR310021 is the genuine ARRMA part that ensures compatibility and longevity across ARRMA models that use this gear specification.
Sourcing authentic ARRMA spares from a trusted UK RC retailer guarantees you receive genuine components engineered to work seamlessly with your vehicle. Whether you're replacing a worn gear after extensive bashing or upgrading your drivetrain for specific performance characteristics, this spur gear delivers the reliability and precision that ARRMA vehicles demand.
Key Features
- 48-Pitch Specification — The 48-pitch rating ensures compatibility with ARRMA models designed for this tooth pitch, allowing precise meshing with your pinion gear for smooth, efficient power delivery across the entire RPM range.
- 81-Tooth Configuration — The 81-tooth count is optimised for specific ARRMA models and driving conditions, affecting acceleration and top speed characteristics to suit basher and racing applications.
- Genuine ARRMA Component — As an official ARRMA spare part, this gear is manufactured to exact specifications and quality standards, ensuring perfect fit and compatibility with your RC vehicle.
- Drivetrain Specialist Part — Designed specifically as a drivetrain spare, this spur gear handles the demanding task of transmitting motor power efficiently to the wheels, critical for consistent performance.
- Wear Replacement Ready — Whether your original gear has suffered impact damage or gradual wear from extensive use, this replacement maintains your RC car's original performance character.
- Easy Installation — As a direct replacement component, installation is straightforward for anyone with basic RC maintenance knowledge, making gear swaps quick and simple.
Technical Performance
The ARRMA Spur Gear 48P 81T operates as the primary driven gear in your RC car's drivetrain system, working in concert with your brushless motor's pinion gear to translate electrical motor power into mechanical motion. The 48-pitch specification means this gear has 48 teeth per inch of diameter, a standard measurement in RC drivetrain engineering that ensures compatibility with matching pinion gears. The 81-tooth count determines the overall gear ratio when meshed with your motor's pinion, directly influencing acceleration characteristics and top speed potential. Spur gears in RC applications must withstand significant torque loads, shock loads from impacts, and sustained rotational stress during extended running sessions. ARRMA engineers these spares using durable materials and precise manufacturing processes to ensure they can handle the demands of off-road bashing, racing, and general recreational driving. The gear's tooth profile is carefully designed to maintain smooth meshing and efficient power transfer while minimising wear on both the spur gear and its mating pinion. For users running brushless motors—which deliver consistent, high-RPM performance—having a properly specified spur gear is crucial for translating that motor power into reliable wheel torque. Whether you're running your ARRMA model on carpet, asphalt, or rough terrain, this spur gear delivers the engineering quality and durability ARRMA vehicles are recognised for in the RC hobby community.
What's in the Box
- ARRMA Spur Gear 48P 81T (Z-AR310021)
Frequently Asked Questions
- What is a spur gear and why do I need one for my ARRMA RC car? — A spur gear is the main driven gear in your RC car's drivetrain, mounted on the main shaft and working with your motor's pinion gear to transmit power to the wheels. It's essential for converting electrical motor power into mechanical motion, and over time, spur gears wear or break from impact and sustained use, requiring replacement to maintain performance.
- Is this suitable for beginners? — Yes, this is an ideal spare part for beginners to stock. Gear maintenance and replacement is one of the fundamental RC car skills to learn, and having a genuine replacement ready means you can get your vehicle running again quickly. Installation requires only basic tools and knowledge.
- How do I know if my spur gear needs replacing? — Signs of spur gear wear include visible tooth damage, unusual grinding or whirring sounds during operation, loss of acceleration, or difficulty engaging power delivery to the wheels. If your RC car has been through significant impacts or extensive running, inspecting and replacing the spur gear is good maintenance practice.
- What is the difference between 48-pitch and other pitch specifications? — Pitch specifications determine tooth size and spacing. The 48-pitch rating means this gear has 48 teeth per inch of diameter. Using the correct pitch is critical—mismatched pitches between your spur gear and pinion gear will result in poor meshing, inefficient power delivery, noise, and accelerated wear. Always verify your model's specification before ordering.
- What ARRMA models use the Z-AR310021 spur gear? — This is a genuine ARRMA spare part designed for specific ARRMA models with 48-pitch drivetrain systems and 81-tooth spur gear configuration. Consult your vehicle's manual or contact RC Model Shop to confirm compatibility with your specific ARRMA model.
- Can I use this spur gear on other RC car brands? — This is an ARRMA-specific part engineered for ARRMA vehicles. While the 48-pitch specification is a standard measurement, using it on non-ARRMA vehicles may result in poor compatibility. Always verify compatibility with your specific RC model before purchasing.
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 Spur Gear 48P 81T Z-AR310021 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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