Fastrax ARRMA Mojave Aluminium Rear Lower Arms Pair FTAR078B

Overview

The Fastrax ARRMA Mojave Aluminium Rear Lower Arms (PR) FTAR078B are precision-engineered suspension components designed specifically for the ARRMA Mojave GROM family of RC cars. These rear lower arms are an essential upgrade for RC enthusiasts in the UK looking to enhance their desert truck's performance, durability and handling characteristics. Whether you're a weekend basher enjoying high-speed runs across rough terrain, or a serious competitor pushing your RC car to its limits, these aluminium arms provide the structural integrity and reliability needed to keep your ARRMA Mojave performing at its best. As a suspension tune-up option, they represent a direct replacement or upgrade path for users seeking improved longevity and consistent performance from their 1/16 scale RC desert truck.

Built from aluminium alloy, these rear lower arms combine lightweight construction with exceptional strength, making them ideal for the demanding conditions that RC desert trucks face during high-speed runs and impacts. The pair configuration means you're receiving both left and right arms in a single purchase, allowing for complete rear suspension refresh or repair. ARRMA is renowned for producing durable, high-performance RC vehicles, and genuine Fastrax upgrade components like these rear lower arms ensure your vehicle maintains that same quality standard. For RC car enthusiasts across the UK seeking reliable spares and performance upgrades, this product offers excellent value and compatibility with multiple ARRMA Mojave GROM variants.

These aluminium rear lower arms are particularly valuable for users who want to extend the working life of their suspension components or those who have damaged their original arms through aggressive driving or crashes. The material choice of aluminium provides the perfect balance between weight savings and durability, allowing your RC car to maintain responsive handling while withstanding the rigours of off-road driving. At RC Model Shop, we stock genuine Fastrax parts because we understand that quality spares make the difference between a reliable, long-lasting RC car and one that constantly needs repairs.

Key Features

• Aluminium Construction — These rear lower arms are manufactured from high-quality aluminium alloy, offering a superior strength-to-weight ratio compared to plastic alternatives, which means your ARRMA Mojave GROM will enjoy improved handling whilst maintaining the weight savings essential for quick acceleration and nimble cornering in tight desert terrain.
• Pair Configuration — You receive both left and right rear lower arms in this purchase, allowing you to replace your entire rear suspension mounting points in one go or maintain spares for quick roadside replacements during RC events and competitions.
• Genuine Fastrax Component — As an official Fastrax product, these arms are engineered to the exact specifications required by ARRMA Mojave GROM models, ensuring perfect fitment and seamless integration with your existing suspension geometry without any modification or adjustment.
• Enhanced Durability — Aluminium construction provides superior durability compared to standard plastic arms, resisting flexing during hard cornering and maintaining consistent suspension geometry even after repeated impacts, which is crucial for maintaining predictable RC car handling.
• Wide Model Compatibility — These arms are designed to fit multiple ARRMA Mojave GROM variants including the 223S BLX 4x4, MEGA 380 Brushed, and GROM RTA Race Kit models, making them a versatile upgrade option for ARRMA owners with different versions of this popular 1/16 scale desert truck.
• Suspension Performance Upgrade — Upgrading to these aluminium arms from worn or plastic components can noticeably improve your RC car's suspension response, particularly during fast cornering and rough terrain driving where arm flex would normally reduce traction and handling precision.

Technical Performance

The Fastrax ARRMA Mojave Aluminium Rear Lower Arms represent a significant engineering upgrade for the 1/16 scale ARRMA Mojave GROM platform. Manufactured from aluminium alloy rather than plastic, these components deliver measurable improvements in suspension rigidity and longevity. The material selection is critical to RC car performance: whilst plastic lower arms are lighter, they flex under load and can crack during hard driving or impacts, compromising suspension geometry and unpredictable handling characteristics. Aluminium arms maintain consistent suspension angles even during aggressive cornering and rough terrain impacts, which translates to more predictable RC car handling and better traction delivery. The build quality reflects Fastrax's reputation as a premium parts manufacturer, with precision engineering ensuring that these arms integrate seamlessly with your ARRMA Mojave GROM's existing suspension system. Whether your vehicle is powered by the brushless 223S BLX system or the brushed MEGA 380 motor, these suspension arms are engineered to handle the suspension loads and cornering forces these powertrains generate. The pair configuration provides complete rear lower arm replacement capability, addressing one of the most common wear and failure points on RC desert trucks subjected to repeated high-speed driving and terrain impacts.

What's in the Box

• Fastrax ARRMA Mojave Aluminium Rear Lower Arms (Pair) — left and right arms for complete rear suspension mounting

Frequently Asked Questions

• Are these rear lower arms compatible with my ARRMA Mojave GROM? — Yes, the Fastrax FTAR078B rear lower arms are specifically designed for ARRMA Mojave GROM models including the 1/16 Mojave GROM 223S BLX 4x4 in both White and Teal variants, the 223S BLX 4x4 in Black, the MEGA 380 Brushed 4x4 in Red and Blue, and the 1/16 ARRMA Mojave GROM 4x4 Race Kit. Check your specific ARRMA Mojave model before purchase to confirm compatibility.
• Why would I need to replace my rear lower arms? — Suspension arms are among the most highly-stressed components on any RC car, particularly desert trucks like the ARRMA Mojave GROM that see high-speed off-road driving. Arms can crack or flex excessively from impacts, hard landings, or simply wear out from extended use. Upgrading to aluminium arms prevents the flexing and cracking common with plastic alternatives, improving suspension responsiveness and handling consistency.
• Will upgrading to aluminium arms improve my RC car's performance? — Upgrading from worn or plastic arms to these aluminium components can provide noticeable handling improvements because aluminium maintains consistent suspension geometry under cornering forces and impacts. You'll experience more predictable steering response, better traction delivery through corners, and improved suspension geometry retention — all factors that RC enthusiasts notice during competitive driving or aggressive terrain sessions.
• Are these arms a direct replacement for stock components? — Yes, these Fastrax arms are engineered as direct replacements for the standard ARRMA Mojave GROM rear lower arms, requiring no modification or adjustment to install. Simply remove your old arms and install these new ones using the same mounting points and fasteners.
• How do aluminium arms compare to plastic alternatives? — Aluminium offers superior strength-to-weight ratio compared to plastic, meaning these arms resist flexing under load whilst remaining lightweight enough to maintain your RC car's performance characteristics. Plastic arms are lighter but flex during cornering and can crack on impact; aluminium maintains its shape and durability through repeated impacts and hard driving sessions, making it the preferred material for serious RC enthusiasts.
• Can I use these arms on other ARRMA models? — These arms are specifically designed for the ARRMA Mojave GROM platform and are compatible with its various motor options (223S BLX, MEGA 380) and configurations (RTR, Race Kit). They are not designed for other ARRMA models like the Granite GROM or other truck platforms, though Fastrax does manufacture similar arms for those models.

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) FTAR078B 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.