TRX9840

Overview

The Traxxas Chassis Rails, 220mm (Steel) (Left & Right) TRX9840 are essential replacement or upgrade parts for Traxxas TRX-4MT monster truck owners in the UK. If you're running one of the popular TRX-4MT models and need to repair or strengthen your chassis, these genuine Traxxas steel frame rails are the perfect solution. These aren't budget aftermarket parts—they're factory-original components engineered to the same exacting standards as your monster truck, ensuring perfect fit, durability and performance every single time you head out to bash.

Monster trucks put enormous stress on their chassis components, especially when you're tackling rocky terrain, jumping off ramps, or driving through rough off-road conditions. The frame rails are critical structural elements that keep everything aligned and absorb impacts. Steel construction offers superior strength and rigidity compared to plastic alternatives, making these rails an investment in longevity. Whether you've damaged your existing rails through heavy use, or you simply want to upgrade to a more robust setup for more aggressive driving, these 220mm steel chassis rails will keep your TRX-4MT performing at its best. They're a staple part for any serious RC enthusiast in the UK who wants to maintain their monster truck in top condition.

For Ready to Run RC monster truck owners, understanding the importance of chassis spares is crucial. The chassis forms the backbone of your RC car, and keeping it in perfect condition ensures optimal handling, durability and overall driving experience. These OEM Traxxas parts are recognised as the gold standard in RC repair and upgrades across the hobby.

Key Features

• Steel Construction — These frame rails are manufactured from steel, providing significantly greater strength and impact resistance compared to plastic chassis components. Steel means better longevity, less flex, and improved performance under stress, which matters when you're pushing your monster truck to its limits on challenging terrain.
• 220mm Length — Precision-engineered to exactly 220mm, these rails match the specifications of your TRX-4MT perfectly, ensuring flawless alignment and fitment without any modifications or adjustments needed when you install them.
• Left and Right Pair — You receive both the left and right chassis rails in a single package, so you have everything needed to complete a full chassis repair or upgrade in one go without hunting for matching parts separately.
• Genuine Traxxas OEM Part — As factory original parts manufactured by Traxxas, these rails are engineered to the same specifications and quality standards as the components on your truck when it left the factory, guaranteeing compatibility and reliability.
• Compatible with Multiple TRX-4MT Models — These rails work with all major TRX-4MT variants including the F150 Monster Truck in both Blue and Black colours, plus the K10 Monster Truck in both Black and Red finishes, making them exceptionally versatile for TRX-4MT owners.
• Spare Parts Availability — As an official Traxxas spare part, these rails are always available to order through authorised UK RC retailers, ensuring you can get replacements whenever you need them without waiting for restock issues.

Technical Performance

The Traxxas TRX-4MT is renowned for its exceptional strength and durability, and that design philosophy extends to every component, including these steel chassis rails. At 220mm in length, they provide the structural foundation that keeps the entire truck rigid during aggressive driving. Steel construction is a step above polymer alternatives, offering superior energy absorption during impacts, better resistance to flex under cornering loads, and exceptional longevity even when your monster truck experiences the kind of hard landings and rough terrain encounters that are inevitable in serious RC bashing. The rails work in conjunction with your TRX-4MT's suspension system to maintain proper geometry and alignment, which directly impacts handling precision, steering response, and overall driving dynamics. Whether you're using your truck for casual weekend bashing or more competitive driving, proper chassis integrity is essential. The engineering tolerances on Traxxas OEM parts are consistently tighter than aftermarket alternatives, meaning you'll experience smoother assembly, better fitment, and more predictable performance out of the box. For UK RC enthusiasts who demand reliability and quality, these genuine Traxxas spares represent excellent value.

What's in the Box

• Left steel chassis rail (220mm)
• Right steel chassis rail (220mm)

Frequently Asked Questions

• Are these OEM Traxxas parts or aftermarket replacements? — These are genuine original equipment manufacturer (OEM) parts made by Traxxas, not aftermarket alternatives. This means they are engineered to the exact same specifications as the original rails on your TRX-4MT, guaranteeing perfect fitment and performance without any compatibility issues.
• Which TRX-4MT models are these compatible with? — These 220mm steel chassis rails are compatible with the complete range of TRX-4MT monster trucks, including the F150 Monster Truck (available in Blue and Black) and the K10 Monster Truck (available in Black and Red). If you own any variant of the TRX-4MT, these rails will fit perfectly.
• Why upgrade to steel chassis rails from plastic alternatives? — Steel construction offers substantially better impact resistance, improved rigidity, and superior longevity compared to plastic chassis components. If you're an aggressive driver or regularly tackle challenging terrain, steel rails will reduce flex, improve handling precision, and last significantly longer before requiring replacement.
• Do I need any tools or expertise to install these rails? — Installation requires basic RC hobby tools and mechanical knowledge. You'll need to remove your damaged or worn rails and attach the new ones using the existing mounting points on your TRX-4MT chassis. The Traxxas instruction manual for your specific model will provide detailed installation guidance.
• Can I buy just one rail or do I need both? — This product includes both the left and right rails as a matched pair, which is the correct way to replace them. For optimal performance and symmetrical handling, you should always replace both rails together rather than just one side.
• Will these improve my monster truck's performance? — If your existing rails are cracked, bent, or flexing, upgrading to these new steel rails will definitely improve performance by restoring proper chassis rigidity, improving steering response, and enhancing overall handling. If your current rails are in good condition, replacement primarily extends the lifespan of your truck and protects against future damage.

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 Traxxas Chassis rails, 220mm (steel) (left & right) TRX9840 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.