Overview
The Fastrax Arrma Grom/Granite/Mojave Metal Differential Hub (4pc) FTAR062 is an essential upgrade for anyone running an Arrma 1/18 scale monster truck and wanting to enhance their vehicle's performance and durability. This precision-engineered metal differential hub set is designed specifically for the Granite Grom, one of the most popular compact RC cars in the UK market, as well as the larger Granite and Mojave models. Whether you're a seasoned RC enthusiast or just getting started with your first brushed 4x4 monster truck RTR, this transmission component offers a significant step up from standard plastic alternatives, delivering improved reliability and longevity during extended bashing sessions.
Fastrax is renowned for producing high-quality replacement parts and tune-up options for RC vehicles, and this metal differential hub set exemplifies their commitment to quality engineering. The four-piece configuration provides complete coverage of your differential system, ensuring smooth power delivery to all four wheels regardless of terrain conditions. This is particularly valuable if you're pushing your Arrma Grom hard on loose surfaces, rocky terrain, or in competitive racing environments where transmission reliability directly impacts performance and your investment protection.
For RC car enthusiasts in the UK looking to fortify their Arrma models against wear and tear, this metal upgrade represents an intelligent investment. The switch from plastic to metal components in the differential hub assembly significantly reduces flex and deflection during acceleration and cornering, translating to more precise handling and a more robust drivetrain overall. Whether you're upgrading a new Granite Grom MEGA 380 Brushed 4x4 Monster Truck RTR or maintaining an existing vehicle, this four-piece set ensures your transmission system remains in peak condition through countless hours of play.
Key Features
- Metal Construction — Manufactured from durable metal alloys rather than plastic, these differential hubs provide substantially greater strength and resistance to impact damage, bending and deformation during aggressive driving and high-speed cornering.
- Four-Piece Set — This complete set of four hubs covers your entire differential assembly, ensuring consistent quality and compatibility across your vehicle's transmission system without mixing different material types.
- Universal Arrma Compatibility — Engineered to fit the 1/18 Arrma Grom, Granite and Mojave models, making this a versatile upgrade option that works across multiple popular Arrma platforms currently sold in the UK RC market.
- Direct OEM Replacement — These hubs serve as direct replacements for the factory plastic components, making installation straightforward without requiring additional modifications or compatibility work on your vehicle.
- Improved Durability — Metal construction dramatically extends the service life of your differential system compared to standard plastic hubs, reducing the frequency of maintenance and replacements over time.
- Enhanced Power Delivery — The rigid metal structure minimises flex during power application, ensuring power from your brushed 380 motor reaches all four wheels more efficiently and consistently.
- Transmission Reliability — By upgrading this critical drivetrain component, you reduce the likelihood of transmission failure during intense play sessions, protecting your investment in your Arrma 4x4 monster truck.
- Fastrax Quality Assurance — Backed by Fastrax's reputation for precision RC parts manufacturing, these hubs meet strict quality standards and are designed to last season after season of regular use.
Technical Performance
The Fastrax Arrma Grom/Granite/Mojave Metal Differential Hub set represents a significant engineering upgrade for 1/18 scale RC monsters trucks operating in the brushed 380 motor category. These metal hubs directly replace the plastic factory components in the differential assembly, which is the critical junction where engine torque is split and distributed to the front and rear axles. The metal construction provides superior rigidity compared to injection-moulded plastic, eliminating the microscopic flexing and deflection that occurs under acceleration loads. This becomes particularly important when driving the brushed MEGA 380 equipped Granite Grom, which, whilst not a high-speed racer, delivers consistent torque across varied terrain. The four-piece configuration ensures comprehensive coverage of the differential system, with each hub precisely machined to OEM specifications for seamless integration. By upgrading from plastic to metal at this critical drivetrain point, you'll notice improved traction control and more responsive handling characteristics, especially during high-torque launches on loose surfaces or when navigating rocky crawling terrain. The enhanced durability means you'll spend less time replacing worn transmission components and more time enjoying your Arrma on the trails and basher tracks across the UK.
What's in the Box
- Four metal differential hub components (complete set for full differential assembly coverage)
Frequently Asked Questions
- Will these metal differential hubs fit my Arrma Granite Grom? — Yes, absolutely. These hubs are specifically engineered for the 1/18 Arrma Grom, and they're also compatible with the larger Granite and Mojave models in the Arrma lineup. Simply verify your model matches one of these three platforms before ordering.
- What's the advantage of metal hubs over the plastic factory parts? — Metal hubs provide substantially greater strength, rigidity and longevity compared to standard plastic components. They resist bending and wear far better, maintain consistent performance longer, and ultimately reduce your total cost of ownership by requiring fewer replacements over the vehicle's lifespan.
- Is this a difficult installation for a beginner RC enthusiast? — Installation difficulty depends on your mechanical familiarity with RC vehicles. If you're comfortable disassembling your Arrma's transmission, this is a straightforward swap where the metal hubs directly replace the plastic originals. If you're new to RC cars, you might benefit from having an experienced friend help guide you through the first installation.
- Will upgrading to metal differential hubs improve my Grom's top speed? — These hubs won't increase raw speed, but they will improve acceleration consistency and traction by eliminating flex in the differential system. You'll experience more responsive handling and better power delivery off the line, which translates to faster overall course times even if peak speed remains similar.
- How often do I need to replace these metal hubs? — Metal hubs last significantly longer than plastic alternatives. With proper maintenance and lubrication of your differential, you can expect many seasons of use before replacement becomes necessary. Inspect periodically for damage, but under normal bashing conditions, these should outlast multiple plastic replacements.
- Are these compatible with the Arrma Granite Grom MEGA 380 brushed version? — Yes, these metal differential hubs are fully compatible with all variants of the 1/18 Arrma Granite Grom equipped with the MEGA 380 brushed motor, regardless of colour variant (Blue/Red, Green, or Red models all use the same transmission system).
- Can I use just one or two hubs, or must I install all four? — For optimal performance and consistency, Fastrax recommends installing the complete four-piece set. Using a mix of metal and plastic hubs can create imbalances in your differential response and is not recommended by the manufacturer.
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 FASTRAX ARRMA GROM/GRANITE/MOJAVE METAL DIFFERENTIAL HUB (4PC) FTAR062 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.
- Brand: Fastrax
- Product Code: FTAR062
- EAN: 5056135785140
- Part Type: Transmission - Differential Hub
- Configuration: Four-piece set
- Material: Metal alloy construction
- Compatible Models: Arrma 1/18 Granite Grom, Arrma 1/18 Granite, Arrma 1/18 Mojave
- Specific Vehicle Compatibility: C-ARA2102T1 Arrma 1/18 Granite Grom MEGA 380 Brushed 4x4 Monster Truck RTR (Blue/Red), C-ARA2102T3 Arrma 1/18 Granite Grom MEGA 380 Brushed 4x4 Monster Truck RTR (Green), C-ARA2102T2 Arrma 1/18 Granite Grom MEGA 380 Brushed 4x4 Monster Truck RTR (Red)
- Tune-Up Category: Transmission upgrade component
- Function: Direct replacement for factory plastic differential hubs
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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- 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.
