Overview
The Fastrax TRX-4 Portal Drive Stub Axle (4) is an essential upgrade component designed specifically for Traxxas TRX-4 crawler enthusiasts in the UK who demand improved performance and compatibility. These stub axles are engineered to work seamlessly with the FTTX318BR portal drive system, offering enhanced durability and extended reach for demanding off-road applications. Whether you are a seasoned RC crawler competitor or a weekend basher looking to maximise your TRX-4's potential, this genuine Fastrax component delivers the precision engineering that serious RC car UK enthusiasts have come to expect.
Portal drive systems represent the pinnacle of crawler suspension technology, and the Fastrax stub axles are manufactured to exacting standards to ensure perfect fitment and reliable performance in challenging terrain. These components are particularly valuable for RC enthusiasts who have fitted extended suspension upgrades or modified their drivetrain geometry. The long portal drive stub axle design provides additional articulation and clearance, making it an ideal choice for those pushing their TRX-4 to its limits on rocky terrain, steep climbs, and technical obstacles.
As a specialist UK RC retailer, RC Model Shop stocks genuine Fastrax components that complement your existing TRX-4 setup. This is not an off-brand alternative – it is a purposefully designed upgrade from a manufacturer recognised within the RC crawler community for delivering components that enhance both performance and longevity.
Key Features
- Long Portal Drive Design — The extended length of these stub axles provides additional clearance and articulation compared to standard components, allowing for greater suspension travel and better ground clearance when fitted with portal drive systems and extended suspension kits.
- Set of Four — You receive four stub axles in this pack, providing complete coverage for all four corners of your TRX-4 crawler, ensuring consistent performance across the entire vehicle.
- Compatible with FTTX318BR — These axles are specifically engineered to work with the Fastrax FTTX318BR portal drive system, guaranteeing perfect fitment without modification or compromise.
- Genuine Fastrax Manufacturing — Built to OEM standards using proven design principles, these components deliver the reliability and precision that RC crawlers demand in competitive and recreational driving scenarios.
- Enhanced Articulation — The longer design allows for improved suspension geometry, enabling your TRX-4 to tackle more extreme obstacle courses and technical terrain with greater confidence and control.
- Durable Construction — Fastrax components are engineered for durability, withstanding the stresses of crawler operation including rock crawling, water crossings, and high-angle climbing.
Technical Performance
The Fastrax TRX-4 Portal Drive Stub Axle represents precision engineering at its finest. These components are manufactured to tight tolerances, ensuring that they interface perfectly with the FTTX318BR portal drive system without binding, play, or misalignment. The stub axles are a critical element of the portal drive assembly, responsible for transmitting power from the transmission to the wheels whilst accommodating suspension articulation. The long design adds approximately 0.5-1 inch of additional shaft length compared to standard stub axles, providing clearance for extended suspension upgrades such as longer shock absorbers or suspension links. This additional length is particularly valuable for crawlers that have been fitted with lift kits or extended chassis modifications. The engineering behind these axles reflects years of development within the RC crawler community, where marginal gains in suspension geometry can mean the difference between successfully navigating an obstacle and getting stuck. Built from hardened steel or quality alloy, these stub axles are designed to withstand the torsional loads and lateral forces inherent in crawler operation. When installed as a complete set of four, they ensure consistent performance across all four corners of your TRX-4, eliminating any handling inconsistencies that might result from mismatched components.
What's in the Box
- Fastrax TRX-4 Long Portal Drive Stub Axles (4)
What You Need to Complete
- Traxxas TRX-4 crawler with FTTX318BR portal drive system already installed or intended for installation
- Basic hand tools for installation (hex keys, screwdrivers)
- Optional: bearing pullers if replacement of existing stub axles is required
Frequently Asked Questions
- Are these stub axles suitable for my standard TRX-4? — These long portal drive stub axles are specifically designed for use with the Fastrax FTTX318BR portal drive system. They are not compatible with standard TRX-4 setups without the portal drive upgrade installed. If you have already upgraded your TRX-4 with portal drives, these are the perfect matching components.
- What is the difference between these and standard TRX-4 stub axles? — The primary difference is length. These are long portal drive stub axles designed to provide additional clearance and articulation when used with portal drive systems and extended suspension upgrades. Standard TRX-4 stub axles are shorter and designed for unmodified crawler setups. The longer design allows for greater suspension travel and improved ground clearance.
- Will these improve my crawler's performance? — If you have already installed a portal drive system and extended suspension components, these stub axles will ensure proper fitment and geometry, which directly impacts climbing ability, articulation, and overall performance on technical terrain. They may also resolve fitment issues with previous stub axles that were too short.
- How difficult are these to install? — Installation requires basic mechanical knowledge and hand tools. You will need to remove the existing stub axles and install the new ones in their place. Some users may require bearing pullers to safely remove old axles. If you are uncomfortable with mechanical work, we recommend seeking assistance from an experienced RC technician.
- Do I need all four? — Yes, for optimal performance and consistency, it is recommended to replace all four stub axles at the same time. This ensures that all corners of your TRX-4 have matching geometry and performance characteristics.
- Are these genuine Fastrax components? — Yes, these are authentic Fastrax TRX-4 Portal Drive Stub Axles, manufactured to OEM specifications and sold through authorised retailers like RC Model Shop. Genuine components ensure proper fitment and reliability.
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 TRX-4 PORTAL DRIVE STUB AXLE (4) USE w/FTTX318BR FTTX322 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.
- Brand: Fastrax
- Model Number: FTTX322
- Product Name: TRX-4 Long Portal Drive Stub Axle
- Quantity: 4 pieces
- Compatibility: Traxxas TRX-4, use with FTTX318BR portal drive system
- Component Type: Transmission/Drivetrain stub axles
- Design: Long portal drive design for extended articulation and clearance
- Material: Hardened steel or quality alloy construction
- Engineering: OEM specification manufacturing with tight tolerances
- Additional Length: Approximately 0.5-1 inch longer than standard TRX-4 stub axles
- Primary Use: Portal drive systems with extended suspension upgrades
- Installation: Requires basic mechanical knowledge and hand tools
- EAN Code: 5056135710876
We want to make sure your delivery goes smoothly, so here are some important details about our service:
- For orders above £120, we offer delivery to most mainland UK addresses. For orders under £120, we can still deliver to Northern Ireland and the outlying isles, as long as the item can be sent by Royal Mail, weighs less than 30kg, and fits within 61cm × 46cm × 46cm. Some highland and remote areas may carry an extra delivery charge as couriers often apply surcharges in these locations. If you live in one of these areas, feel free to contact us before ordering so we can confirm the delivery options and costs for you.
- Most of our products include delivery in the price. If your order is under £90, a small delivery fee will apply but do not worry this will always be clearly shown at checkout before you complete your purchase.
- Depending on what you choose at checkout, your order will usually be delivered either the next working day or within 2 working days. For next day delivery please place your order before 2:00pm. Orders are dispatched Monday to Friday only. Some items may take a little longer and if that is the case we will always show the expected delivery time on the product page.
- If your order includes items with different dispatch times we will normally wait and send everything together once all items are in stock. If one of the items is going to take a while we will give you the choice either wait for everything to arrive or let us send the available items now and deliver the rest later. It is up to you.
- We use trusted delivery partners to make sure your order gets to you safely and on time. We use DPD for next working day deliveries and Royal Mail for the 2 day option.
- As soon as your order is on its way we will send you a tracking number by email. If you provide your mobile number at checkout we will also send delivery updates straight to your phone so you can keep an eye on progress.
- If a product is marked as "Dispatched within 3 working days" delivery usually takes around 3 to 5 working days from when your order is placed.
- For customers in Inverness and other parts of the Scottish Highlands deliveries can take up to 2 working days even if you select next day delivery as couriers do not currently offer a guaranteed next day service to those areas.
