- Manufacturer: ARRMA
- Part Number: Z-ARA310911
- EAN: 5052127033145
- Component Type: Main Differential Gear
- Spare Part Category: Drivetrain Spares
- Tooth Count: 39T
- Gear Type: Spiral
- Quantity: 1 piece
- Compatible Models: ARRMA 1/5 Outcast 4X4 8S BLX EXB Brushless Stunt Truck RTR (C-ARA5810V2T1)
Overview
The ARRMA Main Diff Gear, 39T Spiral (Z-ARA310911) is an essential drivetrain spare part designed specifically for high-performance RC vehicles. This genuine ARRMA component is engineered to deliver reliable differential performance in demanding RC car UK applications, whether you're a competitive racer or an enthusiastic weekend basher. Built with precision spiral gear technology, this main differential gear represents the kind of quality engineering that ARRMA is recognised for throughout the RC hobby community.
Differential gears are critical components in any RC vehicle's drivetrain system, responsible for distributing power between the wheels whilst allowing them to rotate at different speeds during cornering. The 39-tooth spiral design of this particular gear makes it an ideal upgrade or replacement part for maintaining peak performance in your brushless RC model. Whether you're restoring a damaged drivetrain, upgrading to improve performance, or simply maintaining your vehicle with genuine OEM parts, this ARRMA main diff gear is the authentic choice for owners who demand reliability and precision from their RC equipment.
This is a genuine ARRMA spare part, manufactured to exact specifications to ensure perfect compatibility and performance. Available from RC Model Shop, your trusted UK RC retailer, this component comes with the assurance of quality you'd expect from an authorised ARRMA dealer. The single-piece design makes installation straightforward for those with basic mechanical knowledge, and it represents an investment in keeping your RC vehicle running at its best.
Key Features
- 39-Tooth Spiral Gear Design — The 39-tooth configuration combined with spiral gear technology provides smooth, efficient power distribution through your vehicle's drivetrain, ensuring responsive handling and consistent performance during high-speed driving and aggressive cornering manoeuvres.
- Genuine ARRMA Component — Manufactured as an authentic ARRMA spare part, this differential gear meets the exact specifications and quality standards set by ARRMA, ensuring perfect fitment and reliable performance in compatible models without any compatibility issues.
- Drivetrain Optimisation — This main differential gear is engineered to work seamlessly within the drivetrain system of compatible models, maintaining the balance between power delivery and handling characteristics that ARRMA vehicles are known for in the RC car UK market.
- Single-Piece Construction — Supplied as a single, ready-to-install unit, this component makes replacement and maintenance straightforward, allowing you to get your RC model back in action quickly without complex assembly procedures.
- Durable Materials and Engineering — Built using quality materials suitable for the demands of RC driving, this spiral gear is designed to withstand the stresses of acceleration, cornering and general driving whilst maintaining precision tolerances for years of reliable use.
Technical Performance
The ARRMA Main Diff Gear, 39T Spiral represents precision engineering in drivetrain component design. Spiral gearing technology offers significant advantages over straight-cut gears, primarily in noise reduction and smoother power delivery characteristics. The 39-tooth specification positions this gear within ARRMA's range of differential options, providing a specific gear ratio that influences acceleration response and overall vehicle dynamics. This main differential gear is engineered to handle the torque outputs typical of modern brushless RC vehicles, making it suitable for high-performance applications. The spiral tooth design ensures that power is transmitted smoothly across the differential, which is particularly important in dynamic driving situations where the wheels need to rotate at different speeds during cornering. Built to ARRMA's quality standards using materials selected for durability and precision, this component maintains tight tolerances to ensure longevity even under the stresses of competitive driving or intensive recreational use. The single-piece design eliminates assembly variables, ensuring consistent performance every time. Whether you're replacing a worn component or upgrading your existing drivetrain setup, this gear maintains the engineering integrity that ARRMA is recognised for in the RC hobby.
What's in the Box
- ARRMA Main Diff Gear, 39T Spiral (1 piece)
Frequently Asked Questions
- What is a main differential gear and why does my RC model need one? — The main differential gear is a critical component in your RC vehicle's drivetrain that allows power to be distributed to the wheels whilst permitting them to rotate at different speeds, particularly important during cornering. Without a functional differential gear, your vehicle would experience poor handling characteristics and increased wear on components. This 39T spiral gear is specifically engineered to provide smooth, efficient power distribution in compatible ARRMA models.
- Will this main diff gear fit my ARRMA RC model? — This component is confirmed as compatible with the ARRMA 1/5 Outcast 4X4 8S BLX EXB Brushless Stunt Truck RTR model. If you own a different ARRMA model, we recommend checking the part number (Z-ARA310911) against your vehicle's documentation or contacting our expert team at RC Model Shop to confirm compatibility before ordering.
- Is this a genuine ARRMA part? — Yes, the Z-ARA310911 is a genuine, authentic ARRMA spare part manufactured to exact OEM specifications. Purchasing genuine components ensures perfect compatibility, reliable performance and maintains the integrity of your RC vehicle's drivetrain system. At RC Model Shop, we stock only authorised ARRMA parts.
- How do I know if I need to replace my main diff gear? — Signs that your differential gear may need replacement include grinding or unusual noises from the drivetrain, poor handling during cornering, slipping sensations, or visible damage to the gear teeth. If you've damaged your differential through impact or aggressive driving, or if you're performing general maintenance on a well-used vehicle, replacing the gear with a quality OEM component like this is a sensible investment.
- Can a beginner install this gear themselves? — Whilst this is a genuine spare part, installation does require access to your vehicle's drivetrain and basic mechanical knowledge. If you're comfortable disassembling your RC model's transmission system, installation should be straightforward. However, if you're inexperienced with RC vehicle maintenance, we recommend seeking assistance from an experienced RC enthusiast or professional technician to ensure proper installation.
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 Main Diff Gear, 39T Spiral Z-ARA310911 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.
- Most of our products include delivery in the price. If your order is under £90, a small delivery fee will apply but do not worry this will always be clearly shown at checkout before you complete your purchase.
- Depending on what you choose at checkout, your order will usually be delivered either the next working day or within 2 working days. For next day delivery please place your order before 2:00pm. Orders are dispatched Monday to Friday only. Some items may take a little longer and if that is the case we will always show the expected delivery time on the product page.
- If your order includes items with different dispatch times we will normally wait and send everything together once all items are in stock. If one of the items is going to take a while we will give you the choice either wait for everything to arrive or let us send the available items now and deliver the rest later. It is up to you.
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- If a product is marked as "Dispatched within 3 working days" delivery usually takes around 3 to 5 working days from when your order is placed.
- For customers in Inverness and other parts of the Scottish Highlands deliveries can take up to 2 working days even if you select next day delivery as couriers do not currently offer a guaranteed next day service to those areas.
