Overview

The Element RC Enduro Comp Fox 1/10 Scale 4WD Rock Crawler Kit with Portal Axles (EL40129) represents the pinnacle of competitive rock crawling design, built specifically for serious RC enthusiasts and competition crawlers who demand the best performance on challenging terrain. This comprehensive kit is aimed towards dedicated competitors who need a rig capable of progressing through every gate and conquering the toughest obstacles. Whether you're searching for a top-tier RC car UK that delivers genuine competition-grade performance or looking to step up your rock crawling game, the Enduro Comp Fox is engineered with every feature you need to excel.

Element RC has gone above and beyond with this complete competition rock crawling kit, delivering a machine packed full of advanced features designed to help you progress through each challenging section. The philosophy behind the Enduro Comp Fox is simple: you asked for the ultimate competitive crawler, and Element RC has delivered. This isn't just another off-road RC model—this is a purpose-built competition platform that brings together years of crawling expertise, Factory Team innovations, and cutting-edge engineering to create a vehicle that truly means business on the rocks.

From the lightweight carbon fibre chassis to the innovative high-clearance portal axles and tried-and-true Stealth X transmission, every component has been carefully selected and engineered to maximise your competitive advantage. The result is an unassembled kit that requires assembly but rewards you with unlimited tuning potential and the satisfaction of building a genuine competition rig from the ground up.

Key Features

• Carbon Fibre Flat Rail Chassis — The routed carbon fibre flat rail chassis, held together with machined aluminium braces, provides the perfect balance of lightweight construction and rigid strength, which is essential for maintaining a low centre of gravity whilst delivering the durability needed for intense competition use. The lightweight design helps you keep the vehicle's weight minimal without compromising structural integrity, allowing for better performance over obstacles.
• High-Clearance Portal Axles — These newly designed portal axles represent a major breakthrough in rock crawling technology, delivering almost an inch of additional centre axle clearance compared to standard straight axles, which means getting over tough obstacles becomes significantly easier and you'll experience fewer high-centering incidents. All metal gears and ball bearings throughout the portal boxes ensure durability under the massive torque loads inherent with portal-equipped rigs, whilst six screws per portal gearbox guarantee they stay tight even under extreme conditions.
• Stealth X Transmission with Overdrive Gears — The tried-and-true Stealth X transmission features the ability to adjust the rear drive ratio, providing you with flexibility to tune your rig for different terrain and competition gates. The kit includes both standard 5.7% and 11.83% gear options, and optional 12/23 tooth gear sets are available separately for an additional 36% overdrive from axle-to-axle if you need even more underdrive in the rear.
• Forward Bias Aluminium Motor Mount — The two-piece aluminium motor mount flips the motor forward and low, placing the weight directly over the front axles to achieve the ideal targeted 60/40 weight balance, which dramatically improves performance and handling characteristics essential for competition crawling.
• Angled Delrin® Skid Plate — Machined from a solid low-friction Delrin® block, the lower skid plate is angled at 8 degrees whilst keeping the transmission perfectly flat, which helps you get over those difficult breakovers and prevents high centering whilst maximising rear ground clearance for better transition over obstacles.
• Servo-on-Axle Steering — This advanced steering setup places the servo directly on the axle, which provides superior performance whilst keeping the vehicle's centre of gravity low—a critical advantage when navigating tight competition gates and technical terrain.
• Factory Team Hopups — The kit includes several Factory Team performance upgrades straight from the box, including steel pivot balls that are strong, reliable and resistant to abrasion and friction wear, allowing the suspension to articulate smoothly even under extreme conditions; high-clearance links that maximise articulation; and threaded aluminium shocks that deliver consistent performance.
• Steel Pivot Balls — These precision-machined steel components are far more durable and wear-resistant than standard plastic alternatives, ensuring smooth suspension articulation throughout extended competition sessions and rough terrain.
• Universal Front and Rear Drive Axles — The design flexibility of universal drive axles means you can adjust and fine-tune your setup to match specific competition requirements and terrain conditions.
• Telescopic Driveshafts — Both front and rear telescopic driveshafts provide flexibility and allow for suspension articulation without binding, which is essential for rock crawling where extreme suspension movement is constant.
• Extruded Aluminium Driveshaft Splines — These precision-engineered splines ensure reliable power delivery without slipping, even when experiencing the extreme torque loads common in competitive rock crawling scenarios.
• Optimised Ball Cups — Designed for more fluid axle articulation, these ball cups allow smoother movement throughout the suspension range, which is critical when navigating technical obstacles and maintaining traction.
• Machined Input Pinion Gear and Metal Ring Gear — These precision components deliver reliable power transmission and durability under the demanding conditions of competition crawling.
• Metal Ball Bearings — Throughout the drivetrain and suspension, quality ball bearings ensure smooth operation and longevity even under the severe stress of competitive use.
• Steel 25T Servo Horn — A heavy-duty servo horn constructed from steel delivers maximum durability and steering precision, essential for navigating technical gates where every steering input matters.
• Aluminium Steering Plates — Lightweight yet strong, these components contribute to the overall low-weight, high-strength design philosophy of the Enduro Comp Fox.
• Plenty of Suspension Tuning Positions — With multiple shock and link mounting positions throughout the chassis, you have endless increments of suspension tuning options available, allowing you to dial in your setup perfectly for different competition gates and terrain types.

Technical Performance

The Element RC Enduro Comp Fox is engineered as an unassembled kit requiring assembly, making it ideal for experienced builders and competitive crawlers who understand the value of building their own platform. Measuring 410mm in length, 230mm in width, with a 322mm wheelbase and weighing just 1190 grams (2.62 lbs), this 1/10 scale 4WD rock crawler delivers the perfect balance between size, weight and capability. The lightweight construction is absolutely critical in rock crawling—every gram matters when you're trying to maintain traction on steep climbs and prevent high-centering on obstacles. The four-wheel drive system combined with the high-clearance portal axles and servo-on-axle steering creates a platform that excels on the most demanding off-road terrain. This is genuine competition-grade equipment designed to handle the punishing demands of rock crawling competitions where precision, durability and performance determine success. The variable gear ratio options (standard 5.7% and 11.83%, with optional 12/23 tooth sets available) mean you can tune your rig's performance to match specific competition gates and terrain profiles, giving you the flexibility that serious competitors demand. The all-metal construction throughout the drivetrain and portal boxes, combined with the precision machining of components like the Delrin® skid plate and aluminium motor mount, ensures this rig will withstand the extreme loads and stresses of competitive use. Whether you're a seasoned rock crawling competitor looking to upgrade to a dedicated competition platform or an ambitious enthusiast ready to step into the competitive scene, the Enduro Comp Fox provides the engineering excellence and tuning flexibility required to be competitive.

What's in the Box

• Routed carbon fibre flat rail chassis with machined aluminium braces
• High-clearance portal axles with all-metal gears and ball bearings
• Stealth X transmission with standard 5.7% and 11.83% gear options included
• Two-piece forward-bias aluminium motor mount
• Angled Delrin® lower skid plate (8 degrees)
• Factory Team aluminium threaded shocks (front and rear)
• Factory Team steel pivot balls
• Factory Team 5mm heavy-duty steel high-clearance links
• Servo-on-axle steering system with aluminium steering plates
• Universal front and rear drive axles
• Telescopic driveshafts (front and rear)
• Extruded aluminium driveshaft splines
• Machined input pinion gear
• Metal ring gear
• Metal ball bearings
• Steel 25T servo horn
• Optimised ball cups for fluid axle articulation

What You Need to Complete

• Electric motor (brushless recommended for competitive use)
• Electronic Speed Controller (ESC) suitable for 1/10 scale rock crawler
• Suitable LiPo battery (2S or 3S recommended, power bundle required)
• RC receiver and transmitter system
• Servo for steering
• Wheel set with tyres suitable for rock crawling
• Body shell and bodywork (if desired)
• Assembly tools and spare parts for ongoing maintenance

Frequently Asked Questions

• Is the Element RC Enduro Comp Fox suitable for beginners? — The Enduro Comp Fox is classified as Skill Level 3, which indicates this is an intermediate to advanced kit rather than a beginner's model. It requires assembly skills and understanding of rock crawling mechanics. If you're new to RC crawling, you may want to consider starting with a simpler platform first before progressing to this competition-focused machine. However, if you're an experienced RC enthusiast moving into rock crawling, this is an excellent choice.
• What motor do I need for the Element RC Enduro Comp Fox? — The kit does not include a motor, so you'll need to source one separately. For competitive rock crawling, a brushless electric motor is recommended to provide the power, efficiency and reliability demanded by this high-performance platform. Your choice of motor will depend on your preferred gear ratios and the type of terrain you'll be crawling.
• What battery does the Enduro Comp Fox require? — The kit requires a power bundle, which typically means a LiPo battery system. Most competitive crawlers use 2S or 3S LiPo batteries depending on their setup and performance preferences. You'll also need to source an appropriate charger for your chosen battery system.
• What makes the portal axles special compared to standard axles? — The high-clearance portal axles deliver almost an inch more ground clearance than Element RC's standard straight axles, which is absolutely critical in rock crawling where getting over obstacles without high-centering can mean the difference between winning and losing at the gate. The all-metal construction with six-screw portal gearboxes ensures they can handle the extreme torque loads without failing, making them significantly more durable and capable than standard designs.
• Can I use this kit for casual bashing or is it only for competition? — Whilst the Enduro Comp Fox is specifically designed and optimised for competitive rock crawling, its robust construction and advanced features make it perfectly capable for serious off-road terrain and casual crawling adventures. However, it's engineered specifically for competition, so you'll get the most value from this kit if you plan to use it for competitive events where the advanced tuning options and performance features truly shine.
• What is the weight of the completed vehicle? — The chassis alone weighs 1190 grams (2.62 lbs). The complete assembled vehicle weight will depend on your choice of motor, ESC, battery, receiver and other components you add during assembly.
• What is the wheelbase and overall size of this rock crawler? — The Enduro Comp Fox measures 410mm in length, 230mm in width with a 322mm wheelbase, making it a compact 1/10 scale platform that's easy to transport whilst still providing the space needed for advanced suspension tuning and component installation.
• How much suspension tuning flexibility does this kit offer? — The Enduro Comp Fox provides endless suspension tuning options thanks to the multiple shock and link mounting positions throughout the lightweight carbon fibre chassis. This flexibility allows you to dial in your suspension setup perfectly for different competition gates, terrain types and driving styles, which is essential for competitive success.
• What is the forward bias motor mount and why does it matter? — The two-piece aluminium motor mount positions your motor low and forward over the front axles, achieving the ideal 60/40 weight balance that's crucial for rock crawling performance. This weight distribution improves traction on the front wheels whilst keeping the centre of gravity as low as possible, which directly translates to better obstacle negotiation and fewer high-centering incidents.
• Does the Enduro Comp Fox come fully assembled? — No, this is an unassembled kit that requires assembly. This is typical for competition-focused platforms as it allows builders to understand their rig completely and make informed decisions about component selection and setup from the start.

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 Element RC Enduro Comp Fox 1/10 Scale 4WD Rock Crawler Kit with Portal Axles – EL40129 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.