Overview
The ARRMA 57T Metal Center Diff Spur Gear (0.8 MOD) is an essential replacement drivetrain component for serious RC enthusiasts who demand reliability and performance from their RC vehicles. Whether you're a dedicated basher pushing your ARRMA monster truck to its limits or a competitor fine-tuning your setup for optimal performance, this metal spur gear delivers the durability and precision engineering you need. As a genuine ARRMA spare part, it's designed to work seamlessly with a wide range of ARRMA models, making it a must-have in any RC car UK enthusiast's spare parts collection.
This is not just another generic replacement gear—it's a precision-engineered component built to withstand the extreme stresses and punishment that come with high-performance brushless RC driving. The metal construction ensures exceptional durability across all driving conditions, whether you're bashing on rough terrain, competing on a track, or pushing your ready to run RC truck to its maximum capabilities. The 57-tooth configuration and 0.8 MOD tooth profile work together to deliver efficient power transfer and optimal gear meshing characteristics that serious RC hobbyists depend upon.
Compatible with numerous ARRMA models including the GRANITE 223S DSC, Kraton 4X4 4S, MOJAVE 4X4 4S, OUTCAST 4X4 4S, SENTON 223S, TYPHON 223S, and VORTEKS 223S, this versatile spur gear represents excellent value for anyone maintaining a fleet of brushless RC vehicles or looking to upgrade and maximise the performance of their existing setup.
Key Features
- Tough Metal Construction — The spur gear is manufactured from quality metal materials that provide exceptional durability and longevity, ensuring it can handle the extreme torque and stresses generated by modern brushless motors without fracturing or stripping teeth during aggressive driving or racing conditions.
- 0.8MOD Tooth Profile — This precise modulus specification ensures optimal tooth engagement and efficient power transfer from the motor to the drivetrain, reducing power loss and maximising acceleration and top speed whilst maintaining smooth gear mesh operation.
- Center Differential Component — As a centre diff spur gear, this component plays a crucial role in distributing power effectively to the front and rear axles in 4WD ARRMA vehicles, enabling improved traction, cornering performance and overall handling characteristics across varying terrain types.
- Genuine ARRMA Part — Being an official ARRMA replacement component (part number Z-ARA311167) ensures absolute compatibility and reliability with your vehicle, maintaining the engineering standards and performance expectations ARRMA is renowned for in the RC hobby community.
- Wide Vehicle Compatibility — This single replacement gear is compatible with multiple ARRMA 1/10 and 1/8 scale models, including monster trucks, buggies and stadium trucks, making it a practical addition to any serious RC enthusiast's workshop who owns multiple ARRMA vehicles.
Technical Performance
The ARRMA 57T Metal Center Diff Spur Gear represents the pinnacle of drivetrain engineering for high-performance RC vehicles. With its 57-tooth configuration and 0.8MOD tooth profile, this component is specifically engineered to work in harmony with modern brushless motor systems and high-current electronic speed controllers, delivering the precision gear engagement required for reliable performance under extreme conditions. The metal construction provides vastly superior wear resistance compared to plastic alternatives, ensuring the gear maintains its tooth profile and mesh characteristics over extended use periods. This is particularly important when operating powerful brushless systems like the Spektrum Firma 3200KV motor found in many contemporary ARRMA vehicles, where torque levels can exceed the capabilities of composite gears. The centre differential mounting location means this gear is critical to the vehicle's traction and handling characteristics, directly influencing how effectively power reaches the ground. The 0.8MOD specification ensures compatibility with the matching pinion gears and motor assemblies used throughout the ARRMA range, whilst the metal construction guarantees it can handle the continuous stresses of 3S and 4S LiPo battery systems that power modern brushless RC vehicles.
What's in the Box
- 1 x ARRMA 57T Metal Center Diff Spur Gear (0.8MOD)
What You Need to Complete
- Compatible ARRMA RC vehicle with 0.8MOD differential system
- Basic RC tools for drivetrain maintenance (small hex keys, screwdrivers)
- Optional: replacement O-rings or silicone seals if performing comprehensive differential servicing
Frequently Asked Questions
- Is this spur gear compatible with my ARRMA RC truck? — The ARRMA 57T Metal Center Diff Spur Gear (Z-ARA311167) is compatible with multiple ARRMA models including the GRANITE 223S DSC (all colour variants), Kraton 4X4 4S V2, MOJAVE 4X4 4S, OUTCAST 4X4 4S V2, SENTON 223S, TYPHON 223S, and VORTEKS 223S. Check your vehicle's model number to confirm compatibility before ordering. This genuine ARRMA spare part is designed to fit the centre differential assembly of these vehicles without modification.
- Why would I need to replace the centre diff spur gear? — The centre differential spur gear is subject to continuous rotational stresses during normal driving and can wear over time, particularly with high-performance brushless motor systems. Teeth may become worn or damaged from impacts, stripped gear teeth will cause power loss and handling issues, or the gear may require replacement as part of differential servicing and maintenance. Regular inspection of drivetrain components is recommended for serious RC enthusiasts.
- What is the difference between 0.8MOD and other modulus specifications? — MOD (modulus) refers to the tooth pitch and size. The 0.8MOD specification means this gear is designed to mesh with other 0.8MOD components in the drivetrain system. Using mismatched MOD gears will result in poor mesh engagement, increased wear, noise, and potential component failure. Always ensure pinion gears and spur gears share the same MOD specification for your vehicle.
- Is metal or plastic better for RC spur gears? — Metal spur gears like this ARRMA component offer superior durability and longevity compared to plastic alternatives, particularly for high-performance applications using brushless motors. Metal gears can withstand higher torque levels, resist stripping better, and maintain their tooth profile over extended use. For serious bashers and competitors, metal spur gears are the preferred choice despite being slightly more expensive than plastic options.
- Can I fit this myself or do I need professional help? — Fitting a replacement centre diff spur gear requires access to the differential assembly and basic mechanical knowledge. ARRMA vehicles are renowned for their modular design, and the differential module can be accessed relatively easily by removing the required fasteners and pivoting the gearbox cases. However, if you're unfamiliar with drivetrain maintenance, it's advisable to consult your vehicle's instruction manual or seek guidance from experienced RC enthusiasts before attempting the replacement.
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 57T Metal Center Diff Spur Gear, 0.8 MOD Z-ARA311167 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.
