RPM Rear A-Arms for ARRMA 6S V5 EXB Kraton Notorious Outcast Red RPM81729

Overview

The RPM Rear A-Arms in striking red are premium-grade suspension components specifically engineered for the ARRMA 6S V5 and EXB versions of the legendary Kraton, Notorious, Talion, Fireteam and Outcast RC monster trucks. Whether you're an experienced basher looking to upgrade your brushless RC car UK setup or a serious competitor seeking to optimise your suspension geometry, these heavy-duty a-arms deliver the strength, durability and precision handling that separates winning setups from the rest. RPM has completely redesigned these rear a-arms to accommodate the latest chassis updates whilst maintaining reverse compatibility with older models, making them an intelligent investment for any ARRMA 6S enthusiast.

As a performance upgrade for your ready to run RC or competition-grade vehicle, these a-arms represent a significant step forward in suspension engineering. RPM has eliminated the flex and inconsistency that plagues standard factory components by making these support beams 30 percent thicker than their predecessors. The result is dramatically improved durability, greater strength under extreme conditions, and the kind of predictable handling that transforms your vehicle from a weekend basher into a genuine performer capable of tackling the roughest terrain and highest speeds with confidence.

These replacement a-arms are manufactured from RPM's nearly indestructible blend of engineering-grade nylons, a material science achievement that has made RPM the trusted choice across the RC hobby community in the UK and worldwide. When conditions are at their worst—whether that's mud, gravel, concrete or jumps—these a-arms provide the performance you can rely on.

Key Features

• 30 Percent Thicker Support Beams — The support beams in these rear a-arms are significantly beefier than the original 6S version components, delivering substantially improved durability and structural strength whilst dramatically reducing unwanted flex throughout the suspension system. Less flex means more predictable suspension performance and vastly improved handling characteristics, giving you the confidence to push your RC vehicle to its limits.
• Dual Shock Mount Holes for Suspension Versatility — An extra shock mount hole positioned further outboard provides unprecedented suspension tuning flexibility and allows you to dial in the exact geometry your driving style demands. This additional position creates a lower-profile suspension setup where the shocks lay down a little further, effectively dropping your vehicle's ride height and lowering the centre of gravity for dramatically higher corner speeds and superior cornering performance.
• Engineering-Grade Nylon Construction — These a-arms are precision-molded from RPM's proprietary blend of engineering-grade nylons, materials specifically chosen for their near-indestructible properties and exceptional performance under the most demanding conditions. This material selection ensures your suspension components will withstand high-speed impacts, rough terrain, and the punishment of serious RC bashing or competition driving.
• V5 and EXB Model Compatibility — Purpose-designed as stock replacement a-arms for ARRMA's latest V5 and EXB chassis updates, these components feature inner shock mount and inner sway bar holes in stock geometry configuration, ensuring perfect fitment and optimal suspension performance with no modification required.
• Reverse Compatibility with Older Models — Whilst engineered specifically for V5 and EXB versions, these a-arms maintain reverse compatibility with older ARRMA 6S models, providing upgrade options for users with previous-generation vehicles who want to benefit from the improved strength and performance characteristics.
• Sold as Complete Pair — Each package includes one left rear and one right rear a-arm, providing everything needed for a complete rear suspension upgrade on your ARRMA 6S vehicle without requiring multiple purchases.
• Replaces ARRMA Stock Components — These a-arms are direct replacements for the ARRMA #ARA330654 factory component, meaning installation is straightforward for users upgrading from stock ARRMA suspension or for first-time builders looking for superior aftermarket components from day one.

Technical Performance

From an engineering perspective, the RPM Rear A-Arms represent a quantum leap forward in suspension design for 1/8-scale ARRMA 6S vehicles. The 30 percent increase in support beam thickness is not a minor cosmetic change—it fundamentally alters how the suspension behaves under load. Traditional plastic a-arms flex under the enormous forces generated by high-speed cornering, landing from jumps, and rough terrain impacts. This flex translates directly into inconsistent suspension geometry, unpredictable handling, and ultimately slower lap times or less controlled bashing sessions. By eliminating flex, RPM ensures that your suspension geometry remains consistent regardless of load conditions, delivering the kind of predictable handling that separates competitive drivers from casual enthusiasts. The dual shock mount system is equally sophisticated: by providing two mounting positions, it allows suspension tuning without requiring expensive aftermarket shocks or complicated geometry changes. The inboard position maintains stock geometry for V5 and EXB models, whilst the outboard position enables lower-profile setups that reduce ride height and centre of gravity. For competitors running ARRMA 6S vehicles in monster truck or speed racing formats, this flexibility is invaluable. The engineering-grade nylon material used throughout has been extensively tested to withstand the stresses generated by brushless motors delivering peak performance in competition environments, high-speed bashing, and extreme-condition driving. Whilst not metal components, the nylon blend used by RPM has proven through countless user reports and competitive results to be more durable than aluminium a-arms in many real-world applications, offering superior impact absorption and reduced breakage rates when subjected to the violent forces of modern RC driving.

What's in the Box

• 1x RPM Rear Left A-Arm (Red)
• 1x RPM Rear Right A-Arm (Red)

Compatibility Information

These rear a-arms are specifically engineered for ARRMA 6S V5 and EXB models, including the Kraton, Notorious, Talion, Fireteam and Outcast platforms. The inner shock mount and inner sway bar holes are configured to stock geometry for these V5 and EXB models—do not use the outer shock mount and outer sway bar holes for V5 or EXB vehicles. For users with V4 and earlier ARRMA 6S models, these a-arms will fit but require using the outer shock mount and outer sway bar holes instead, which correspond to the ARRMA #AR330249 original component geometry. A-arms replace ARRMA factory component #ARA330654.

Frequently Asked Questions

• Are these rear a-arms compatible with my ARRMA 6S? — These RPM Rear A-Arms are specifically designed for ARRMA 6S V5 and EXB versions, including Kraton, Notorious, Talion, Fireteam and Outcast models. They are direct stock replacements for the ARRMA #ARA330654 factory component. If you have an older V4 or earlier model, these a-arms will physically fit but require using the outer shock mount and sway bar holes instead of the inner holes. Always verify your model version before ordering.
• What makes these a-arms stronger than the original RPM 6S version? — The support beams in these redesigned a-arms are 30 percent thicker than the original 6S version, providing significantly improved durability and strength whilst reducing the flex that compromises suspension performance. This thickness increase directly translates to more predictable handling, faster cornering speeds, and greater reliability during intense driving sessions.
• How does the dual shock mount system work? — These a-arms feature both an inner shock mount hole (stock geometry for V5 and EXB models) and an outer shock mount hole positioned further outboard. By selecting the outer mounting position, you can achieve a lower-profile suspension setup that drops the ride height and lowers the vehicle's centre of gravity, resulting in higher corner speeds and improved handling dynamics. The inner position maintains factory geometry.
• Will these a-arms improve my handling? — Yes, significantly. The 30 percent thicker support beams eliminate the flex found in factory components, resulting in more consistent suspension geometry and vastly more predictable handling. The dual shock mount holes provide additional tuning flexibility to dial in the exact suspension characteristics your driving style requires, whether you're a competitive racer or serious basher.
• Are these suitable for competitive racing or just casual bashing? — These a-arms are suitable for both applications. Many competitive ARRMA 6S drivers use RPM components precisely because of their superior strength and consistent performance. The engineering-grade nylon construction provides excellent durability for both weekend bashers and serious competitors, with the added benefit of better impact absorption compared to metal alternatives in many real-world scenarios.
• What material are these a-arms made from? — RPM Rear A-Arms are precision-molded from an engineering-grade nylon blend specifically formulated for near-indestructible performance. This material has been engineered to withstand the extreme forces generated by brushless motors, high-speed impacts, and rough terrain whilst maintaining structural integrity and reducing flex compared to both factory plastic components and some aftermarket metal options.
• Do I need special tools or expertise to install these? — Installation is straightforward for users with basic RC mechanical knowledge. These are direct replacements for the ARRMA #ARA330654 factory component, meaning the mounting points are identical. If you've previously worked on ARRMA suspension, installation will be familiar. For first-time installers, basic RC tools and a service manual are recommended.
• What is the difference between using the inner and outer shock mount holes? — The inner holes maintain stock suspension geometry for V5 and EXB models and should be used for standard setups. The outer holes, positioned further outboard, create a lower-profile suspension configuration that drops ride height and lowers centre of gravity, improving cornering performance and speed. Experiment with both positions to find the setup that best suits your driving conditions and style.
• Are these a-arms available in different colours? — Yes, RPM offers these rear a-arms in red (this product), and black options are also available for customers preferring a different colour scheme for their ARRMA 6S vehicle.
• Will these fit with my existing shocks and suspension components? — Yes, these a-arms are designed to work with standard ARRMA 6S suspension components and shocks. The dual shock mount holes provide flexibility to work with various shock configurations and mounting positions. However, always verify compatibility with your specific vehicle version (V5, EXB, or older) before installation.

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 RPM REAR A-ARMS RED FOR EXB/ V5 6S ARRMA KRATON/OUTCAST/ RPM81729 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.