Product Details
Strong steel for long-lasting durability in extreme RC conditions - Precision manufactured tooth profile for consistent mesh with pinion gear and smooth operation - 50T, 1 module gear tooth configuration - For use with 29mm diff case differential
Requires- To be used with differential fitted with ARA310983
- Part Type: Spur Gear
- Tooth Count: 50T
- Module: 1 module
- Gear Material: Steel
- Differential Case Size: 29mm
- Quantity Included: 1 x spur gear
- Manufacturer: ARRMA
- Part Number: ARA310978
- Compatible Differential: ARA310983 (29mm Diff Case)
- Compatible Vehicle Models: 1/7 Big Rock 6S 4X4 RTR, 1/7 Fireteam 6S 4X4 RTR, 1/7 Mojave 6S 4X4 RTR, 1/7 Mojave V2 6S 4X4 RTR, 1/7 Mojave 6S EXB, 1/8 Kraton 6S 4X4 Roller, 1/8 Kraton 6S 4X4 RTR, 1/8 Notorious 6S 4X4 RTR, 1/8 Outcast 6S 4X4 RTR, 1/8 Talion 6S 4X4 RTR, and related variants
- Construction Type: Spur gear (plate differential)
- Tooth Profile: Precision manufactured for consistent mesh and smooth operation
Overview
The ARRMA Spur Gear 50T Plate Diff for 29mm Diff Case (Z-ARA310978) is an essential replacement transmission component for serious RC enthusiasts running ARRMA's high-performance brushless RC monster trucks, buggies, desert trucks and speed trucks. Whether you're a seasoned competitor, weekend basher, or dedicated RC car UK hobbyist, this precision-engineered spur gear delivers the durability and performance you need to keep your RC vehicle performing at its peak. ARRMA is renowned for engineering robust components that withstand extreme off-road conditions, and this 50T spur gear is no exception, offering reliable power transmission whether you're pushing your ready to run RC through challenging terrain or fine-tuning your competition setup.
This spur gear is specifically designed for ARRMA differentials featuring the 29mm diff case, making it the ideal direct replacement for worn or damaged gears. The 50T tooth configuration provides the precise gear ratio needed for optimal performance across a wide range of ARRMA models, from the 1/7 scale Big Rock, Mojave and Talion to the 1/8 scale Kraton, Notorious, Outcast and Talion variants. If you've experienced gear slippage, broken teeth, or inconsistent power delivery, upgrading to this OEM ARRMA spur gear will restore your RC's transmission to factory specifications and ensure smooth, reliable operation.
Available now in the UK, this replacement spur gear represents genuine ARRMA engineering and quality. It's precision manufactured to exacting tolerances and uses strong steel construction to handle the extreme torque and rotational forces generated by brushless RC motor systems. Whether you're maintaining your existing ARRMA RC vehicle or upgrading a worn transmission system, this spur gear is the authentic choice for professional-grade performance.
Key Features
- Strong Steel Construction — Manufactured from high-quality steel, this spur gear provides exceptional durability for long-lasting performance in extreme RC conditions, resisting wear and tooth damage that can occur during intense off-road driving and competitive racing.
- Precision Manufactured Tooth Profile — Each tooth is engineered with a precision profile that ensures consistent, smooth mesh with your pinion gear, reducing noise, vibration and power loss while delivering maximum efficiency to the wheels.
- 50T Tooth Configuration — The 50-tooth design provides an optimised gear ratio specifically calculated for ARRMA's brushless RC vehicles, delivering the perfect balance of acceleration and top-speed performance across different driving scenarios.
- 1 Module Gear Specification — This gear uses the standard 1 module tooth configuration, ensuring perfect compatibility with ARRMA's OEM pinion gears and differential systems without requiring any modifications or adjustments.
- 29mm Diff Case Compatibility — Engineered specifically for use with ARRMA's 29mm diameter differential case, guaranteeing perfect fitment in all compatible models without gaps, play or assembly issues.
- OEM Quality Assurance — As a genuine ARRMA component, this spur gear meets the manufacturer's strict quality standards and engineering specifications, providing the reliability and performance you'd expect from factory parts.
Technical Performance
The ARRMA Spur Gear 50T represents the pinnacle of transmission engineering for high-performance brushless RC vehicles. Constructed from strong, hardened steel, this spur gear is engineered to withstand the extreme rotational forces generated by ARRMA's brushless motor systems, which deliver massive torque to the transmission. The precision-manufactured tooth profile ensures that each engagement with the pinion gear is smooth, consistent and efficient, eliminating the slippage and jerky power delivery that can result from worn or poorly manufactured gears. The 50-tooth configuration is specifically optimised for ARRMA's differential systems, delivering the ideal gear ratio for the vehicle models it's designed to fit. Whether you're running a 1/8 scale brushless speed truck like the Kraton 6S or a larger 1/7 scale desert truck like the Mojave 6S, this spur gear has been engineered to integrate seamlessly with the 29mm diff case differential system. The 1 module tooth specification means this gear meshes perfectly with ARRMA's standard pinion gears, providing reliable power transmission with minimal backlash. For users of UK-based RC car racing or serious off-road bashers, the robust steel construction ensures that tooth breakage is minimised even under extreme loading conditions, meaning longer service life and fewer emergency pit stops.
What's in the Box
What You Need to Complete
- Differential fitted with ARA310983 (29mm Diff Case) — This spur gear must be used in conjunction with the compatible 29mm diff case differential housing.
Compatibility Guide
This 50T spur gear is engineered as a standard or optional part for a comprehensive range of ARRMA RC vehicles. Compatible models include the 1/7 Big Rock 6S 4X4 RTR Brushless Monster Truck, the 1/7 Fireteam 6S 4X4 RTR Brushless Buggy, the 1/7 Mojave 6S 4X4 RTR Brushless Desert Truck (both original and V2 versions), the 1/7 Mojave 6S EXB 4X4 Roller version, and the 1/8 Kraton 6S range including the 4X4 Roller, 4X4 RTR (V5 and V6), and 6S EXB 4X4 RTR variants. Additionally, this gear is compatible with the 1/8 Notorious 6S 4X4 RTR (V5 and V6), the 1/8 Outcast 6S range including RTR and limited edition models, plus the 1/8 Outcast 6S EXB AVC version. The 1/8 Talion 6S range is also supported, including the 4X4 RTR in red and black and the 6S EXB AVC variant. This broad compatibility makes it an excellent choice for users with multiple ARRMA vehicles in their fleet.
Frequently Asked Questions
- Is this ARRMA spur gear suitable for beginners? — Yes, whilst this is a replacement component rather than a complete vehicle, it's ideal for anyone who already owns an ARRMA RC car and needs to maintain or upgrade their transmission. If your gear shows signs of wear, slipped teeth or inconsistent power delivery, this genuine OEM component will restore your vehicle to factory performance. Beginners should be aware that this is a transmission component requiring some mechanical knowledge to install correctly.
- What makes this spur gear better than aftermarket alternatives? — As a genuine ARRMA component (OEM part ARA310978), this spur gear is engineered to the manufacturer's exact specifications and uses the same materials and manufacturing processes as the factory parts included with new ARRMA vehicles. This guarantees perfect fitment, optimal mesh characteristics with ARRMA's pinion gears, and the durability standards expected from professional-grade RC racing equipment. Aftermarket gears may offer cost savings but often compromise on precision and longevity.
- Which ARRMA models use the 50T spur gear with 29mm diff case? — This 50T gear is compatible with a wide range of ARRMA brushless RC vehicles, including the 1/7 scale Big Rock 6S, Fireteam 6S, Mojave 6S and Talion 6S models, plus the 1/8 scale Kraton 6S, Notorious 6S, Outcast 6S and Talion 6S variants. The 29mm diff case housing is standard across these models, ensuring broad compatibility across the ARRMA performance range.
- How often do I need to replace my spur gear? — With proper maintenance and appropriate driving conditions, a quality steel spur gear like this one should provide thousands of miles of trouble-free service. However, aggressive driving, impacts with obstacles, or running in sandy conditions can accelerate wear. If you notice slipped teeth, grinding sounds during acceleration, or a loss of power to the wheels, it's time to replace your spur gear. Regular inspection during maintenance is recommended for serious racers and bashers.
- Can I use this gear with other differential types? — No, this spur gear is specifically engineered for use with ARRMA differentials featuring the 29mm diff case diameter. It must be used with a differential housing fitted with the ARA310983 component. Using this gear with incompatible differential types may result in poor mesh, slippage or component damage.
- What is the difference between 50T and other spur gear sizes? — Spur gear tooth count directly affects your vehicle's acceleration and top speed. A 50T spur gear provides a specific gear ratio optimised for ARRMA's brushless motor systems. Larger tooth counts (such as 52T or 54T) give faster top speed with slightly reduced acceleration, whilst smaller tooth counts provide faster acceleration with lower top speed. The 50T is the standard configuration for most ARRMA models and delivers the best all-round performance balance.
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 50T Plate Diff for 29mm Diff Case Z-ARA310978 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.
- We use trusted delivery partners to make sure your order gets to you safely and on time. We use DPD for next working day deliveries and Royal Mail for the 2 day option.
- As soon as your order is on its way we will send you a tracking number by email. If you provide your mobile number at checkout we will also send delivery updates straight to your phone so you can keep an eye on progress.
- 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.
