Overview
The Fastrax ARRMA Mojave Aluminium Rear Upper Arms (PR) FTAR077B is a premium suspension upgrade component designed specifically for the ARRMA Mojave GROM 1/16 scale RC desert truck range. These rear upper arms represent a genuine performance enhancement for owners seeking to improve their RC car's handling characteristics, durability and overall suspension geometry. Whether you're enjoying weekend bashing sessions around the UK or pushing your small-scale desert truck to its limits, these aluminium rear upper arms deliver the kind of quality and precision engineering that separates serious RC enthusiasts from casual operators. Manufactured by Fastrax, a recognised name in RC aftermarket performance parts, these components are built to exacting standards and offer a direct bolt-on upgrade path for compatible ARRMA Mojave models.
Suspension tuning is one of the most effective ways to transform the handling and performance of your RC car, and upgrading to quality aftermarket arms like these Fastrax units allows you to fine-tune your vehicle's setup for specific driving conditions and personal preference. If you've been searching for "RC suspension upgrades UK" or "ARRMA Mojave performance parts", these rear upper arms are exactly what you need. The aluminium construction provides the perfect balance between weight savings and structural rigidity, ensuring your RC truck maintains consistent suspension geometry even during aggressive driving. This is a true performance component that delivers measurable improvements in cornering stability, jump landing consistency, and overall chassis responsiveness that you'll feel immediately when piloting your ARRMA Mojave GROM.
RC Model Shop stocks genuine Fastrax components for the complete ARRMA range, and we understand that serious RC enthusiasts demand quality parts backed by reliable supply chains. These rear upper arms are precision-engineered to exact factory specifications, ensuring perfect fitment and compatibility across all listed ARRMA Mojave GROM variants without modification or adjustment required.
Key Features
- Aluminium Construction — The use of precision-machined aluminium alloy provides an optimal weight-to-strength ratio that reduces unsprung mass while maintaining the rigidity required for consistent suspension performance, especially important in small-scale desert truck applications where every gram affects handling response and battery runtime.
- Pair Configuration — These parts come as a matched pair (PR designation) for the rear suspension, meaning you receive both left and right arms together, allowing you to upgrade the complete rear upper suspension geometry in one purchase and ensure perfect symmetry and balance.
- Direct OEM Fitment — Engineered to factory specifications for seamless compatibility with ARRMA Mojave GROM variants, these arms require no modification, custom fabrication or adapter plates, allowing you to complete the upgrade quickly and confidently knowing perfect fitment is guaranteed.
- Performance Suspension Upgrade — Upgrading your suspension arms is one of the most effective chassis modifications available to RC car owners, directly influencing cornering performance, bump compliance, jump stability and overall handling consistency across varied terrain.
- Fastrax Quality Standard — Fastrax is recognised throughout the RC hobby as a manufacturer of premium aftermarket components, and these rear upper arms exemplify the precision engineering and quality control standards the brand is known for delivering to demanding RC enthusiasts.
- Small-Scale Specialist Design — Specifically engineered for 1/16 scale ARRMA Mojave GROM models, these arms are optimised for the unique suspension requirements and performance characteristics of small-scale desert truck racing and bashing in the UK market.
Technical Performance
The Fastrax ARRMA Mojave Aluminium Rear Upper Arms represent a focused engineering solution for precision suspension tuning on ARRMA's 1/16 scale desert truck platform. Constructed from precision-machined aluminium alloy, these rear upper arms provide the structural rigidity necessary for consistent suspension geometry maintenance during aggressive cornering, jumps and high-speed bashing whilst simultaneously reducing unsprung mass compared to heavier factory alternatives. The aluminium material choice is critical in small-scale RC applications where weight distribution directly impacts acceleration response, battery efficiency and handling balance. The arms are manufactured to exacting tolerances ensuring perfect bore alignment for suspension bearings and mounting points, which translates to smooth, predictable suspension travel and eliminates binding or inconsistent damping response that can result from worn or poorly-fitted OEM components. For the ARRMA Mojave GROM range—available in multiple variants including the 223S BLX brushless models in Teal, Black and White finishes, the MEGA 380 brushed variant in Blue and Red, and the full RTA race kit configuration—these rear upper arms provide the performance upgrade path that serious small-scale RC competitors and dedicated bashers alike depend upon. Installation is straightforward, requiring only basic RC maintenance tools and knowledge, making this an accessible upgrade even for RC enthusiasts relatively new to suspension tuning and component selection.
What's in the Box
- Fastrax Aluminium Rear Upper Arms (pair for left and right rear suspension)
- Precision-machined mounting brackets
- Mounting fasteners compatible with ARRMA suspension specifications
Frequently Asked Questions
- Are these rear upper arms compatible with my ARRMA Mojave GROM? — Yes, these Fastrax aluminium rear upper arms are engineered specifically for compatibility with the following ARRMA Mojave GROM variants: the 1/16 MOJAVE GROM 223S BLX 4x4 Dirt Truck available in Teal (C-ARA2304ST1), Black (C-ARA2304T1) and White (C-ARA2304ST2) finishes, the 1/16 MOJAVE GROM MEGA 380 Brushed 4x4 small-scale desert truck available in Blue (C-ARA2104T2) and Red (C-ARA2104T1), and the 1/16 ARRMA MOJAVE GROM 4x4 RTA race kit configuration (C-ARA2104KT1). These are direct replacements requiring no modification.
- What are the advantages of upgrading to aluminium rear upper arms? — Upgrading to quality aftermarket suspension arms like these Fastrax units offers multiple performance benefits: aluminium construction reduces unsprung mass which improves acceleration and handling response, precision machining ensures perfect geometry and eliminates wear-related inconsistencies found in worn OEM components, and upgrading both left and right arms simultaneously ensures perfectly balanced suspension geometry which directly improves cornering stability and jump landing consistency.
- Is this suitable for beginners? — Whilst these are quality performance components, suspension arm replacement is an intermediate-level modification that requires basic RC maintenance knowledge including familiarity with bearing installation, bolt torque specifications and suspension geometry. Beginners with no prior RC experience should perhaps start with more fundamental tuning adjustments like tyre pressure and shock oil weight before progressing to structural suspension upgrades.
- What tools will I need to install these rear upper arms? — You'll require basic RC maintenance tools including appropriate hex wrenches, possibly circlip tools for bearing installation depending on your current setup, and a torque wrench for proper fastener specification. These are standard tools found in any RC enthusiast's toolkit.
- Why should I replace my existing rear upper arms? — Factory-fitted suspension arms wear over time, developing play in bearing bores and loose fastener holes that degrade handling consistency. Additionally, if you've experienced suspension geometry changes, inconsistent handling, or want to upgrade to lighter components for improved performance, quality aftermarket arms like these Fastrax units deliver measurable improvements in responsiveness and durability.
- Is the FTAR077B still available and in stock at RC Model Shop? — Yes, the Fastrax ARRMA Mojave Aluminium Rear Upper Arms FTAR077B are in stock and available for immediate order through RC Model Shop, ensuring you can complete your suspension upgrade without lengthy waiting periods.
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 MOJAVE ALUMINIUM REAR UPPER ARMS (PR) FTAR077B 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
- Model Number: FTAR077B
- EAN Code: 5056135785324
- Component Type: Aluminium Rear Upper Arms
- Configuration: Pair (left and right)
- Construction Material: Precision-machined aluminium alloy
- Tune-Up Type: Suspension upgrade
- Scale: 1/16
- Vehicle Category: ARRMA Mojave GROM small-scale desert truck
- Compatible with ARRMA 1/16 MOJAVE GROM 223S BLX 4x4 Dirt Truck Teal (C-ARA2304ST1)
- Compatible with ARRMA 1/16 MOJAVE GROM 223S BLX 4x4 Dirt Truck Black (C-ARA2304T1)
- Compatible with ARRMA 1/16 MOJAVE GROM 223S BLX 4x4 Dirt Truck White (C-ARA2304ST2)
- Compatible with ARRMA 1/16 MOJAVE GROM MEGA 380 Brushed 4x4 small-scale desert truck Blue (C-ARA2104T2)
- Compatible with ARRMA 1/16 MOJAVE GROM MEGA 380 Brushed 4x4 small-scale desert truck Red (C-ARA2104T1)
- Compatible with ARRMA 1/16 MOJAVE GROM 4x4 RTA race kit (C-ARA2104KT1)
- Suspension geometry: Optimised for 1/16 scale desert truck performance
- Installation: Direct OEM fitment, no modification required
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.
