Overview
The Fastrax TRX-4 Aluminium Rear Knuckle Portal Cover is an essential upgrade for serious TRX-4 enthusiasts who demand superior protection and durability from their RC crawler. This premium chassis component is manufactured from high-quality aluminium, offering exceptional strength-to-weight characteristics that make it the ideal choice for off-road RC car UK owners looking to enhance their vehicle's longevity and performance. Whether you're tackling technical trail courses, rocky terrain, or simply want to protect your investment from the rigours of regular use, this two-pack rear knuckle portal cover set provides the defence your TRX-4 needs to keep performing at its best.
As an authorised Traxxas TRX-4 upgrade part, the Fastrax FTTX313BK represents genuine engineering excellence for 1/10 scale RC crawlers. The TRX-4 platform has become the gold standard for trail-rated RC vehicles in the UK RC hobby market, and Fastrax has earned its reputation by producing precision-engineered aftermarket components that enhance both the aesthetic appeal and functional durability of these acclaimed crawlers. Whether you're a weekend basher exploring local trails or a dedicated crawler competitor preparing for events, protecting critical drivetrain components like your rear knuckles is an investment in reliability and peace of mind.
This product is specifically designed for those who recognise that genuine parts matter. The pack contains two aluminium portal covers—one for each rear knuckle assembly—ensuring comprehensive protection across the entire rear axle assembly where significant stress and impact loads occur during crawling operations.
Key Features
- Premium Aluminium Construction — Manufactured from high-grade aluminium alloy, these portal covers deliver exceptional rigidity and impact resistance whilst maintaining minimal weight penalty, ensuring your TRX-4 remains nimble and responsive on the trail.
- Two-Pack Configuration — Each package includes two separate covers, providing complete protection for both rear knuckle assemblies on your TRX-4, eliminating the need to purchase multiple sets.
- Precision Engineering — Fastrax components are engineered to factory specifications, ensuring perfect fitment to your Traxxas TRX-4 chassis without modification, drilling, or adjustment required.
- Protection Against Impact and Wear — The portal covers shield your rear knuckles from rock strikes, debris, mud accumulation, and lateral impacts that commonly occur during technical crawling and trail exploration.
- Preserves Factory Aesthetics — Unlike bulky protective solutions, these aluminium covers integrate seamlessly with the TRX-4's design language, maintaining the vehicle's sleek appearance whilst adding visible performance-oriented styling.
- Compatible with Multiple TRX-4 Models — These covers fit a comprehensive range of Traxxas TRX-4 variants, from the classic unassembled chassis kit through to the latest licensed body versions including the Chevrolet K10 Cheyenne, Ford F-150 Ranger, Chevrolet K5 Blazer, Nissan Pathfinder, Ford Bronco, and Land Rover Defender models.
- Easy Installation — Designed as a direct bolt-on upgrade, installation requires no special tools or expertise, making this an accessible upgrade for all skill levels from complete beginners to experienced RC competitors.
- Genuine Fastrax Quality — As part of the official Fastrax product ecosystem, these covers are manufactured to the same exacting standards that have made the brand trusted by RC enthusiasts across the UK and internationally.
Technical Performance
The Fastrax TRX-4 Aluminium Rear Knuckle Portal Cover represents serious engineering focused on reliability and longevity. Manufactured from aerospace-grade aluminium alloy, the material selection reflects careful consideration of the forces experienced by rear portal assemblies during challenging crawling operations. The rear knuckles are among the most vulnerable drivetrain components on a TRX-4, particularly during rock crawling where uneven terrain, sharp impacts, and lateral stress loads can cause damage to expensive OEM plastic assemblies. By upgrading to aluminium covers, you significantly extend the service life of these critical joints and reduce the frequency of replacement or repair. The construction is sufficiently rigid to resist deformation from typical trail impacts, yet the aluminium material remains lighter than steel alternatives, preserving your TRX-4's handling characteristics and centre of gravity. These covers integrate with the existing TRX-4 architecture without modification, maintaining the precise suspension geometry and drivetrain alignment that makes the TRX-4 such an effective trail performer. The finish is durable and resistant to corrosion from exposure to moisture, mud, and environmental contaminants commonly encountered during outdoor RC crawling in the UK climate. Installation is straightforward, with covers mounting directly to existing fastening points on the rear knuckle assemblies, making this an ideal first upgrade for TRX-4 owners seeking meaningful protection without extensive disassembly or modification.
What's in the Box
- Fastrax TRX-4 Aluminium Rear Knuckle Portal Cover (qty. 2)
Frequently Asked Questions
- Which TRX-4 models does this portal cover fit? — The Fastrax FTTX313BK is compatible with an extensive range of Traxxas TRX-4 variants, including the TRX-4 Chevrolet K10 Cheyenne High Trail Edition in multiple colour options (Black, Metallic Silver, Metallic Blue, Brown, Red, and Metallic Copper), the Ford F-150 Ranger XLT High Trail Edition, the 1972 Chevrolet K5 Blazer High Trail Edition, the 1979 Chevy Blazer, the Nissan Pathfinder SE-V6 3S, the 2021 Ford Bronco, the Land Rover Defender in multiple colours, and the unassembled TRX-4 chassis kit. Essentially, if you own any version of the Traxxas TRX-4 platform, these portal covers will fit your vehicle.
- Why should I upgrade my TRX-4 with aluminium portal covers? — The rear knuckle assemblies are subjected to tremendous forces during trail crawling, rock crawling, and off-road exploration. The factory plastic portal covers can crack, break, or deform under impact loading, leading to costly repairs and downtime. Upgrading to heavy-duty aluminium covers provides superior protection, extends component lifespan, and gives you confidence when tackling challenging terrain. For anyone serious about their RC crawler UK hobby, this upgrade represents excellent value for money in terms of reliability and longevity.
- How difficult is installation? — Installation is very straightforward and requires minimal mechanical skill. The covers bolt directly onto the existing rear knuckle assemblies using factory fastening points, with no drilling, cutting, or modification required. You'll need basic hex wrenches (included in most TRX-4 tool kits) and approximately fifteen minutes per side. This is an ideal first upgrade project for beginners looking to enhance their ready-to-run RC vehicle without intimidating technical work.
- Will these covers fit my ready-to-run TRX-4? — Yes, these portal covers are fully compatible with all ready-to-run RC TRX-4 models. Whether you own a complete RTR model with body and battery or a bare chassis, the covers will fit correctly. Simply follow the installation instructions included in the product documentation, and you'll have upgraded protection within thirty minutes.
- Do I need any additional tools or components? — All you need for installation is a basic hex wrench set (commonly provided with TRX-4 purchase or available separately). The covers come ready to install with all fastening hardware included. No additional tools, adapters, or components are required.
- What makes Fastrax components reliable? — Fastrax has built its reputation through precision engineering, quality material selection, and rigorous testing. The company manufactures components that integrate seamlessly with Traxxas vehicles whilst exceeding OEM durability standards. By choosing Fastrax for your TRX-4 upgrades, you're investing in components developed by engineers who understand crawlers and understand the demands of serious RC enthusiasts.
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 Aluminium Rear Knuckle Portal Cover (2) FTTX313BK 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: FTTX313BK
- EAN: 5056135709160
- Product Type: Aluminium Rear Knuckle Portal Cover
- Quantity: 2 (covers per pack)
- Compatible Vehicle: Traxxas TRX-4 all variants
- Compatible Models: TRX92056-4-BLK, TRX92056-4-SLVR, TRX92056-4-BLUE, TRX92046-4-BRWN, TRX92086-4-BLUE, TRX82276-4-BLK, TRX82216-4-R6, TRX110056-4-RED, TRX92056-4-RED, TRX92056-4-COPR, TRX92046-4-BLUE, TRX92086-4-RED, TRX92046-4-BLK, TRX82276-4-RED, TRX110056-4-SLVR, TRX92076-4-RED, TRX92076-4-WHT, TRX92076-4-ORNG, TRX92076-4-BLK, TRX82256-4-GRN, TRX82256-4-SAND, TRX82256-4-RED, TRX82256-4-SLVR, TRX82234-4-ORNG, TRX82224-4-GRAY, TRX82044-4-BLUE, TRX82224-4-BLUE
- Material: Aluminium alloy
- Tune-Up Type: Chassis
- Application: Rear knuckle protection
- Scale: 1/10
- Vehicle Platform: Traxxas TRX-4 crawler
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