RPM Rear A-Arms for ARRMA Typhon 4x4 3S BLX Suspension Upgrade RPM80842

Overview

If you're serious about getting the best performance from your ARRMA Typhon 4x4 3S BLX or Big Rock 3S V3, the RPM Rear A-arms (RPM80842) are the upgrade you've been waiting for. These aren't just simple replacement parts — they're engineered suspension components designed to transform how your RC car handles, looks and performs on the track or bashing field. Whether you're a dedicated racer looking for competitive edge, a weekend basher wanting maximum durability, or an RC enthusiast in the UK exploring suspension upgrades, RPM's reputation for quality and innovation makes these A-arms an obvious choice.

RPM A-arms for the Typhon 4x4 3S BLX represent everything you're looking for in a set of replacement A-arms. The engineering team at RPM have created versions that are more adjustable, more durable and significantly lighter than the stock ARRMA components they replace. These aren't marginal improvements — they're genuine performance upgrades backed by RPM's decades of experience in the RC suspension market. The Rear A-arms replace the standard ARRMA part number AR330540, making installation straightforward for anyone familiar with basic RC maintenance.

As a UK RC car enthusiast, you'll appreciate that choosing quality aftermarket suspension components is one of the smartest investments you can make. Better suspension geometry leads to improved handling, faster corner speeds, and a car that's more forgiving when things don't go to plan. RPM has engineered these A-arms to work seamlessly with your Typhon's existing setup while delivering measurable improvements in adjustability, durability and weight savings.

Key Features

• Dual Shock Mount Design for Superior Adjustability — RPM has added a second shock mount to both the front and rear A-arms, positioned on the outside of the stock shock mount location. This dual-mount design adds genuine adjustability to your suspension setup, allowing you to fine-tune ride height and handling characteristics without replacing components. The outer shock mount option lowers your ride height when selected, which increases overall stability across all surface types and delivers the added benefit of enabling faster corner speeds through improved weight distribution.
• Enhanced Durability Through Engineering-Grade Nylon — These A-arms are moulded from RPM's trademark blend of indestructible, engineering-grade nylon materials that have earned recognition throughout the RC hobby as some of the toughest available. Beyond the superior material selection, RPM has completely redesigned the shape and geometry of the A-arms to improve survivability during those inevitable crash moments, whilst retaining the stock suspension geometry so your car continues to handle as ARRMA intended. The result is a component that can withstand the punishment of aggressive driving and regular bashing.
• Significant Weight Savings Without Compromise — Thanks to stronger materials and improved designs, RPM engineers were able to cut out unnecessary weight whilst maintaining unparalleled performance and durability standards. Each Rear A-arm is more than 7 grams lighter than its stock ARRMA counterpart, which may not sound dramatic until you realise this directly improves acceleration, handling response and overall agility. Lighter unsprung weight means your Typhon's suspension responds more quickly to terrain changes, translating to better traction and more predictable handling on rough ground.
• Perfect Compatibility With ARRMA Typhon 4x4 3S BLX and Big Rock 3S V3 — These RPM Rear A-arms are specifically engineered for the ARRMA Typhon 4x4 3S BLX and also fit the ARRMA Big Rock 3S V3, making them a versatile upgrade for owners of these popular 4WD brushless RC vehicles. The direct replacement design means no modifications or adaptations are required — they simply bolt in place of the standard AR330540 components.

Technical Performance

The RPM Rear A-arms represent a genuinely thoughtful engineering approach to suspension upgrades. Built from engineering-grade nylon compounds that have proven themselves across countless RC applications, these components deliver the kind of durability that makes them investment-worthy rather than disposable. The weight reduction of 7+ grams per arm directly impacts your Typhon's performance characteristics; lighter unsprung suspension mass means improved traction as the tyres maintain better ground contact during acceleration and deceleration, whilst the vehicle responds more quickly and precisely to driver inputs. The dual shock mount system isn't merely a gimmick — it's a functional design feature that allows you to adjust ride height on the fly without component swaps, effectively giving you multiple suspension setups in one purchase. Whether you're running your Typhon on asphalt, dirt, grass or mixed terrain, the ability to lower your ride height through the outer shock mount position increases chassis stability and aerodynamic efficiency. The redesigned arm geometry, whilst maintaining ARRMA's original suspension angles and geometry, incorporates strengthened stress points that make the A-arms more resistant to the twisting and bending forces that lead to cracks in standard plastic components. For UK RC car enthusiasts running brushless 4WD vehicles like the Typhon 4x4 3S BLX in competitive or casual settings, these suspension upgrades deliver measurable improvements in handling precision, corner speed and overall reliability.

What's in the Box

• RPM Rear A-arms for ARRMA Typhon 4x4 3S BLX (pair)

Frequently Asked Questions

• Will RPM Rear A-arms fit my ARRMA Typhon 4x4 3S BLX? — Yes, these are designed specifically for the ARRMA Typhon 4x4 3S BLX. They also fit the ARRMA Big Rock 3S V3. The RPM80842 directly replaces the stock ARRMA AR330540 A-arms without requiring any modifications or adapters. Installation is straightforward for anyone with basic RC maintenance experience.
• How much weight do these A-arms save compared to stock components? — RPM Rear A-arms are more than 7 grams lighter per A-arm than the stock ARRMA components, representing meaningful unsprung weight reduction. Lighter unsprung weight directly improves suspension response, traction and overall handling characteristics, particularly noticeable when pushing your Typhon through corners or over challenging terrain.
• What is the dual shock mount system and how do I use it? — RPM has added a second shock mount to both front and rear A-arms on the outside of the stock shock mount location. You can mount your shock absorber to either position depending on your setup preferences. The outer shock mount position lowers ride height, increasing stability and enabling faster corner speeds. This adjustability gives you multiple suspension tuning options without requiring component changes.
• Are RPM A-arms more durable than stock ARRMA A-arms? — Yes, significantly. These are moulded from engineering-grade nylon that is tougher than standard plastics used in stock components. RPM has also redesigned the arm shape to strengthen weak points whilst maintaining the original suspension geometry. The result is a component that's more resistant to cracks and damage from impacts, making them ideal for aggressive driving and regular bashing.
• Will these A-arms improve my lap times? — These upgrades can contribute to faster lap times through several mechanisms. The weight savings improve acceleration and handling response, the lower ride height option increases stability through corners enabling higher speeds, and the improved durability means less chassis flex during hard driving, all contributing to more consistent and predictable handling that lets you push harder with confidence.
• Do I need to adjust anything after installing these A-arms? — RPM has designed these A-arms to retain your Typhon's original suspension geometry, so installation is essentially a bolt-on upgrade. However, you now have the option to experiment with the outer shock mount position to adjust ride height and find the setup that works best for your driving style and local terrain.

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 FOR ARRMA TYPHON 4x4 3S BLX RPM80842 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.