Fastrax Arrma Mojave Grom Aluminium Rear Lower Arms Suspension Pair 1/16 FTAR078BK

Overview

The Fastrax Arrma Mojave Aluminium Rear Lower Arms (PR) represent a premium upgrade option for owners of compatible Arrma 1/16 scale desert truck models. These precision-engineered suspension components are designed to enhance the durability and performance of your RC car UK setup, providing superior strength compared to standard plastic parts. Whether you're a seasoned RC enthusiast running a brushless RC truck or someone looking to maintain their ready to run RC model in peak condition, these rear lower arms deliver the reliability and performance upgrade that serious bashers demand.

Fastrax has established itself as a trusted manufacturer of high-quality RC replacement parts and upgrades, and these aluminium lower arms exemplify their commitment to engineering excellence. The rear lower arms are absolutely critical suspension components on any 4x4 RC desert truck, as they connect the wheel hub assembly to the chassis and bear significant stress during high-speed runs, jumps, and rough terrain driving. Upgrading to aluminium construction from the original plastic parts provides substantially improved longevity and resistance to bending or breaking, even under demanding use conditions. For RC enthusiasts in the UK seeking to extend the lifespan of their Mojave Grom models or simply wanting to add competition-grade parts to their setup, these arms represent an excellent investment.

These components come as a pair, meaning you're receiving both the left and right rear lower arms needed for a complete rear suspension refresh. Installation is straightforward for anyone with basic RC maintenance skills, and the bolt-on design means no complex modifications to your chassis are required. The aluminium construction provides a significant weight and durability advantage over standard plastic arms, making them an ideal choice for anyone serious about maximising their RC truck's performance potential.

Key Features

• Precision Aluminium Construction — The arms are manufactured from quality aluminium alloy rather than plastic, providing significantly greater strength and rigidity that resists bending and flexing under heavy use, which is especially important when landing jumps or navigating rocky terrain in competitive racing or casual bashing scenarios.
• Pair Package Included — This product includes both left and right rear lower arms, so you have a complete suspension upgrade solution ready to install without needing to purchase additional parts.
• Direct Replacement Design — These arms are engineered as direct replacements for the original Arrma Mojave parts, meaning they bolt directly onto your existing chassis and suspension geometry without requiring any modification or adaptation.
• Compatible with Multiple Mojave Models — These rear lower arms are designed to fit across the entire Arrma Mojave Grom range, including both the BLX brushless models and the MEGA brushed models, as well as the race kit versions, providing versatility across multiple variants of this popular 1/16 scale desert truck platform.
• Improved Longevity and Durability — The aluminium construction stands up to extended bashing sessions far better than plastic alternatives, meaning fewer broken parts, less downtime for repairs, and better value for money over the lifetime of your RC model.
• Lightweight Upgrade — Whilst stronger than plastic, aluminium offers a weight advantage that helps improve acceleration, handling response, and overall performance characteristics without adding unnecessary mass to your suspension system.

Technical Performance

These Fastrax aluminium rear lower arms represent a significant engineering upgrade for the Arrma Mojave platform. The aluminium construction provides a materials science advantage over injection-moulded plastic in multiple critical ways. First, aluminium offers superior tensile strength, meaning the arms can withstand greater force before bending or breaking, which translates directly into improved reliability during high-speed running, aggressive cornering, and landing jumps. Second, aluminium maintains its structural integrity across a wide temperature range, so whether you're bashing in summer heat or winter cold conditions typical across the UK, the arms perform consistently. The manufacturing process used by Fastrax ensures precise tolerances that match the original equipment specifications, maintaining proper suspension geometry and handling characteristics of your Mojave.

The suspension arm is a critical stress-bearing component that connects the wheel hub carrier to the chassis via ball joints at each end. During cornering, acceleration, and deceleration, these arms transmit enormous forces—not only the vehicle's weight but also the dynamic loads created by impact and direction changes. The aluminium construction in these Fastrax parts means they can handle repeated high-stress cycles without permanent deformation, whereas plastic arms may gradually flex or crack under identical conditions. This makes them ideal for anyone running a brushless RC truck with high power output, or anyone engaged in competitive racing where reliability directly impacts race results. The direct replacement design ensures that suspension geometry remains correct, which is essential for maintaining proper handling balance and tyre contact.

What's in the Box

• Pair of Fastrax Arrma Mojave Aluminium Rear Lower Arms (left and right)

Frequently Asked Questions

• Which Arrma Mojave models are these rear lower arms compatible with? — These Fastrax aluminium rear lower arms are compatible with the full range of Arrma Mojave Grom models, including the 1/16 Mojave Grom 223S BLX 4x4 Desert Truck available in Teal, Black, and White colour options with both battery and charger included or without, the Mojave Grom MEGA 380 Brushed 4x4 available in Blue and Red, and the 1/16 Arrma Mojave Grom 4x4 Race Kit that includes battery and charger, ensuring compatibility across the entire current Mojave Grom lineup.
• Why should I upgrade to aluminium rear lower arms instead of keeping the standard plastic parts? — Aluminium offers dramatically superior durability compared to the original plastic arms, particularly if you're running a brushless RC truck or engaging in frequent bashing sessions. The increased strength means fewer broken parts, less downtime for repairs, and better long-term value. Additionally, aluminium provides better performance characteristics through improved rigidity and lighter weight compared to plastic, which translates to improved handling response and acceleration.
• Are these difficult to install? — No, these are direct replacement parts that bolt directly onto your Arrma Mojave using the existing mounting points, requiring no modifications or special tools beyond standard RC maintenance equipment like hex wrenches and screwdrivers. Most RC enthusiasts can complete the installation in under an hour.
• Will these arms improve my RC car's performance? — Yes, in multiple ways. The increased rigidity improves suspension geometry consistency, which enhances handling stability and cornering performance. The lighter weight of aluminium compared to reinforced plastic improves acceleration and responsive handling. Most importantly, the improved durability means your suspension maintains its performance characteristics longer without degrading, which is critical for competitive racing or frequent bashing.
• What is the difference between these Fastrax arms and the original Arrma plastic parts? — The primary difference is material: these use precision aluminium alloy whilst original Arrma Mojave models use injection-moulded plastic. Aluminium is significantly stronger, more rigid, and lighter, translating to improved durability, handling performance, and overall longevity. For serious RC enthusiasts committed to maintaining their Mojave in peak condition, the aluminium upgrade is a worthwhile investment.

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 LOWER ARMS (PR) FTAR078BK 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.