Fastrax Arrma Grom Granite Aluminium Rear Upper Arms Pair FTAR052R

Overview

The Fastrax Arrma Grom/Granite Aluminium Rear Upper Arms (PR) FTAR052R represent a precision-engineered upgrade component designed specifically for owners of Arrma Grom and Granite RC models in the UK market. These rear upper arms are manufactured from lightweight aluminium alloy, offering superior durability compared to standard plastic components whilst maintaining the low mass critical for optimal performance in competitive RC racing and casual bashing alike. Whether you're a seasoned RC enthusiast looking to enhance your 1/10 scale vehicle or a dedicated hobbyist seeking genuine OEM-quality replacement parts, this pair of arms delivers exceptional value and reliability.

The Arrma Grom and Granite are popular 1/10 scale electric RC vehicles renowned for their speed, agility and robust construction, making them ideal for both track racing and off-road adventure. Upgrading to aluminium suspension components is one of the most effective performance modifications available to RC car UK owners, as it directly improves handling characteristics, increases component longevity and provides a more responsive driving experience. These Fastrax rear upper arms are engineered to exact specifications, ensuring perfect fitment and compatibility with your Arrma model without modification or adjustment.

When you choose Fastrax spare parts and upgrades from RC Model Shop, you're investing in quality components from a manufacturer recognised throughout the RC hobby for precision manufacturing and performance-oriented design. The transition from standard plastic arms to aluminium suspension geometry is one of the most noticeable performance improvements available at this price point, delivering tangible benefits in handling, durability and overall driving enjoyment.

Key Features

• Aluminium Alloy Construction — Manufactured from premium aluminium alloy material, these rear upper arms provide exceptional strength-to-weight ratio compared to plastic alternatives, reducing unsprung mass and improving suspension response whilst resisting bending and deformation during aggressive driving.
• Precision Engineering — Fastrax components are engineered to exacting tolerances and manufactured using CNC machinery, ensuring perfect dimensional accuracy and consistent fitment across every pair, eliminating the need for modification or adjustment during installation.
• OEM-Specification Design — These arms are designed to exact Arrma specifications, meaning they maintain the precise suspension geometry and handling characteristics that Arrma engineers intended, with no compromise to performance or driveability.
• Direct Fitment for Grom and Granite — Specifically engineered as a matched pair for both Arrma Grom and Granite 1/10 scale models, ensuring compatibility without any guesswork or trial fitting, making installation straightforward for anyone with basic RC maintenance knowledge.
• Enhanced Durability — Aluminium construction dramatically extends component lifespan compared to plastic arms, reducing the frequency of replacement and repair whilst maintaining consistent suspension geometry throughout the lifetime of the component.
• Improved Handling Characteristics — The reduced flex and superior rigidity of aluminium suspension arms translate directly into more responsive steering input, improved cornering stability and enhanced predictability during high-speed driving.
• Professional-Grade Upgrade — These arms represent the type of component upgrade favoured by competitive RC racers and experienced bashers alike, delivering performance gains that are genuinely noticeable during driving without requiring advanced technical knowledge to install.
• Value-Focused Pricing — At £8.99 (ex VAT £7.49), this upgrade represents exceptional value for money, offering genuine performance improvement at a price point accessible to all RC enthusiasts, from beginners upgrading their first vehicle to experienced racers maintaining competition machines.

Technical Performance

The Fastrax Arrma Grom/Granite Aluminium Rear Upper Arms FTAR052R deliver measurable performance improvements through their superior material science and precision manufacturing. Aluminium alloy possesses a significantly higher strength-to-weight ratio compared to the plastic materials used in standard OEM arms, meaning these components can withstand greater force without deformation whilst contributing less to overall vehicle mass. This is particularly beneficial in 1/10 scale electric RC cars, where unsprung suspension mass directly impacts acceleration, braking and overall vehicle responsiveness. The rigid aluminium construction eliminates the subtle flex that occurs in plastic arms during aggressive cornering and high-speed manoeuvres, maintaining precise suspension geometry throughout dynamic driving scenarios. For Arrma Grom and Granite owners utilising brushless electric drivetrain systems with LiPo battery power, the improved suspension consistency delivered by these aluminium arms translates into more predictable handling through technical sections and enhanced corner exit grip. The engineering tolerances maintained in Fastrax components ensure that left-to-right suspension geometry remains perfectly matched, a critical factor in maintaining balanced handling and maximising tyre contact with the track surface. Whether driving on carpet tracks, hard-packed earth or gravel terrain, the durability and performance characteristics of aluminium suspension arms represent a worthwhile upgrade investment for any RC car enthusiast in the UK looking to extract maximum performance from their Arrma model.

What's in the Box

• Fastrax Arrma Grom/Granite Aluminium Rear Upper Arms — pair (left and right components)

Frequently Asked Questions

• Are these rear upper arms compatible with both Arrma Grom and Granite models? — Yes, these Fastrax arms are engineered as a direct match for both the Arrma Grom and Arrma Granite 1/10 scale RC vehicles. They are supplied as a matched pair and will fit both models without any modification or adjustment required.
• What are the advantages of upgrading to aluminium suspension arms from plastic? — Aluminium rear upper arms offer several significant advantages over standard plastic components including superior durability that extends component lifespan dramatically, reduced flex under cornering forces which improves suspension consistency and handling predictability, lighter unsprung mass that enhances acceleration and braking response, and increased rigidity that maintains precise suspension geometry during aggressive driving. These benefits combine to deliver noticeably improved handling and performance during both competitive racing and casual bashing.
• Is installation of these arms straightforward for someone with basic RC knowledge? — Yes, these Fastrax arms are a direct fitment component requiring only basic RC maintenance skills to install. They connect to the existing suspension mounting points on your Arrma Grom or Granite using standard hardware, and installation should take only a few minutes once you're familiar with your vehicle's suspension design. If you're comfortable removing your vehicle's suspension, you have the skills necessary to install these arms.
• Will these arms fit my Arrma Grom or Granite without any cutting, drilling or modification? — These arms are precision-engineered to Arrma specifications for direct fitment without any modification whatsoever. No cutting, drilling, filing or other adjustments are required; they simply install in place of your original components.
• Why are these rear upper arms sold as a pair? — Suspension arms are always supplied in matched pairs (left and right) because your vehicle requires both components for proper operation. The pair ensures you have perfectly matched geometry on both sides of the vehicle, critical for balanced handling and predictable performance during driving.
• What is the weight benefit of aluminium arms compared to plastic? — Whilst the weight savings of individual suspension arms are modest, the cumulative effect of upgrading multiple suspension components to aluminium is noticeable in vehicle performance. Reduced unsprung mass improves acceleration, braking response and suspension articulation during driving.
• Are Fastrax components genuine Arrma parts or aftermarket replacements? — Fastrax is a recognised manufacturer of high-quality RC upgrade and replacement components, and these arms are engineered to precise Arrma specifications. They are compatible replacement components designed to equal or exceed OEM performance standards, making them an excellent choice for upgrades or repairs.
• How long do aluminium suspension arms typically last compared to plastic? — Aluminium suspension arms typically exhibit significantly extended lifespan compared to plastic components, as they resist cracking, deformation and fatigue failure far more effectively. With normal use, aluminium arms should provide many seasons of reliable service, whilst plastic arms may require replacement annually depending on driving intensity.

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 ALUMINIUM REAR UPPER ARMS (PR) FTAR052R 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.