Vanquish VS4-10 Portal Axle Builders Kit VPS09023

Overview

The Vanquish VS4-10 Portal Axle Builders Kit (VPS09023) is a premium 1/10 scale rock crawler chassis designed for serious enthusiasts who demand exceptional performance, durability, and trail-conquering capability. This unassembled kit brings together cutting-edge engineering and precision manufacturing to create a foundation that defines your own path across demanding terrain. Whether you're building your first custom RC car UK or adding to an established collection, the VS4-10 Portal Axle setup delivers the ground clearance, control and stability needed to master technical trails and obstacles.

Built by Vanquish Products, a California-based manufacturer renowned for passion and precision, this chassis combines scale realism with high-performance durability. The VS4-10 has become a popular choice among RC rock crawler enthusiasts across the UK and worldwide, trusted by weekend warriors and competition builders alike. At the heart of this kit lies the advanced VFD Twin transmission paired with F10 Portal Axles—a drivetrain combination that has earned widespread praise for exceptional durability, precise engineering, machined gears and smooth performance. This is the highest-specification version available in kit form, engineered for demanding terrain where lesser components would fail.

If you're searching for a brushless RC crawler that puts you in complete control of your build, or you want a ready-to-customise chassis that responds to your exact specifications and driving preferences, the Vanquish VS4-10 Portal Axle Builders Kit delivers on every front. The portal axle design eliminates the need for traditional ball joints while providing unmatched ground clearance, making it an ideal choice for UK hobbyists tackling rocky terrain, technical courses and extreme crawling environments.

Key Features

• VFD Twin Transmission with Selectable Overdrive — This advanced transmission system allows on-the-fly overdrive shifting between standard 6.5% and high 46% modes, dramatically changing driving dynamics to suit any terrain. The selectable overdrive neutral position also enables 2WD mode by disengaging the front output when needed, providing versatility that traditional fixed-ratio transmissions cannot match. Built internally with hardened chromoly shafts, machined internal gears, and bearing plates reinforcing critical load points, this transmission is engineered for durability under extreme conditions.
• 3-Position Dig Unit for Precise Terrain Control — The integrated 3-position dig unit locks the rear axle for tight turns or provides full control on steep inclines. Borrowing from Vanquish Products' proven Hurtz dig design, this system delivers reliable, smooth operation without hesitation. This feature is invaluable when navigating rock gardens or extreme technical courses where wheel articulation control is critical.
• F10 Portal Axles with High-Clearance Design — Portal axles maximise ground clearance around the C-hubs and knuckles whilst reducing the size of the differential housing, improving obstacle clearance and minimising hang-ups on technical terrain. The rigid one-piece moulded housings incorporate an integrated truss that strengthens the axle structure by tying both ends together, providing structural integrity that rivals much heavier designs. This portal configuration keeps your rig performing in situations where traditional straight-axle designs would struggle.
• High-Pinion Machined Hypoid Gears (30/8) — The high-pinion hypoid gear setup improves gear engagement, reduces driveline stress, and provides smoother power delivery compared to standard spur gear arrangements. These precision-machined components ensure reliable power transfer and longevity even under extreme loading conditions found in rock crawling.
• Heavy Alloy Portal Knuckle Weights — Strategic weight placement lowers the centre of gravity, improving climbing performance and reducing the risk of rollovers on technical terrain. Both front and rear axles include weighted brass tube inserts for added strength and weight distribution, whilst the front axle features dedicated heavy alloy knuckle weights for enhanced stability.
• 49° of Steering Angle — The portal axle design and reinforced C-hubs provide an exceptional 49° steering angle, delivering tighter turning capability in challenging conditions. This is substantially greater than many competitors' offerings, giving you the manoeuvrability needed for tight spots and technical course negotiation.
• Incision 80mm S8E Shocks with Premium Build — Equipped with hard-anodised aluminium shock bodies featuring 8mm bore threaded design, these shocks provide smooth suspension articulation with dual X-ring seals, locking preload collars, keyed spring cups, and polished steel shock shafts. The 80mm length delivers excellent suspension travel whilst maintaining scale proportions, and the adjustable lower shock mounting position allows fine-tuning of suspension geometry to suit your driving style.
• Steel C-Channel Chassis with Integrated Features — The heavy-duty steel C-channel frame provides exceptional rigidity and strength whilst maintaining scale proportions. Moulded front and rear cross members reinforce high-stress areas, increasing structural integrity where it matters most. The design incorporates dual servo mounting locations, integrated winch line routing, a scale fuel cell, and an integrated battery tray that accommodates most batteries including hard case LiPo and standard stick pack sizes.
• Modular Rock Sliders with Replaceable Sections — The rock sliders feature a replaceable tapered outer portion, allowing easy adjustments to accommodate different body widths whilst serving as a protective barrier against obstacles. This ensures a precise fit for a wide range of body styles without sacrificing durability, making your VS4-10 adaptable to various builds and preferences.
• ISD10 Driveshafts with CV-Style Joints — Power is transferred through ISD10 driveshafts featuring machined CV-style joints for smooth and efficient operation. The 6mm output shafts with M5 wheel nuts ensure durability and compatibility with a wide range of wheel setups commonly used in UK RC communities.
• Stainless Steel Suspension Links — The 3-link front suspension with panhard keeps the servo hidden for scale realism without sacrificing suspension travel. Stainless steel links ensure low weight and durability, with stainless steel pivot balls and offset lower shock pivot balls allowing fine-tuning of suspension geometry at the axle.
• Machined Aluminium Panhard Mount — This precision-machined component provides reliable steering geometry, keeping suspension movement controlled and predictable under extreme trail conditions. The design withstands severe trail impacts without deflection or binding.
• Extended Motor Protection Skid Plate — The VFD Twin transmission features an extended skid plate that provides added protection for the motor in rough terrain, ensuring your drivetrain survives encounters with rocks and obstacles that would damage unprotected components.
• Compatible with 540 Brushed and Brushless Motors — The kit accepts most standard 540 size motors, whether brushed or brushless, giving you complete freedom in selecting the motor that suits your terrain and driving style. This compatibility means you can choose from countless aftermarket motor options available from UK RC suppliers.

Technical Performance

The Vanquish VS4-10 Portal Axle Builders Kit represents the pinnacle of 1/10 scale rock crawler engineering, combining precision manufacturing with advanced drivetrain technology. The VFD Twin transmission delivers exceptional control through selectable overdrive operation, allowing you to adjust your overall gear ratio on the fly between 53.7:1 (standard 6.5% overdrive) and 35.8:1 (high 46% overdrive) at the front, with a fixed 57.2:1 rear ratio. This flexibility means a single kit can handle dramatically different crawling scenarios without mechanical changes. The transmission utilises a 15T steel pinion and 52T spur gear (32P) as standard, with a 5.25:1 axle gear ratio that provides optimal torque delivery for technical terrain. The slipper eliminator ensures maximum power transfer without wheel spin, whilst the molded transmission housing maintains scale appearance alongside the molded spur gear cover.

Suspension geometry and articulation are handled by the proven combination of 80mm Incision S8E shocks paired with a 3-link front suspension and triangulated rear suspension. The wheelbase of 313mm (12.3 inches) and overall width of 200mm (7.87 inches) provide balanced proportions for both scale appearance and functional performance. The hard-anodised aluminium shock bodies feature dual X-ring seals and locking preload collars, allowing you to fine-tune spring rates and damping characteristics to match your specific terrain and driving style. The kit includes threadlock compound, 30-weight shock oil, and a 7mm to 8mm thin-wall wheel nut adapter tool, providing essential maintenance supplies for long-term reliability.

Build quality throughout reflects Vanquish Products' commitment to precision engineering. Machined components include the motorplate, VFD front gears, VFD Twin T-case gears, hypoid axle gears, and portal gears—every critical drivetrain element is manufactured to exacting tolerances. The aluminium VFD posts and sintered shift arms with brass pivot shift bushings ensure smooth, reliable overdrive and dig actuation. Chromoly slide dogs handle the shifting loads without deflection or wear. The rigid one-piece axle housings with integrated truss reinforcement eliminate flex and deflection that plagues lesser designs. The high-caster reinforced C-hubs are engineered to handle the extreme side-loading encountered in technical rock crawling. This is not a budget design compromised by cost-cutting—this is a purpose-built platform for serious RC enthusiasts who refuse to accept compromise.

What's in the Box

• VFD Twin Transmission with machined motorplate
• Machined VFD front gears and T-case gears
• Aluminium VFD posts
• F10 Portal Axle housings (front and rear)
• Machined hypoid axle gears (30/8)
• Machined portal gears
• Heavy alloy portal knuckle weights
• Brass axle tube inserts
• ISD10 driveshafts with machined CV-style joints
• Heavy-duty steel C-channel chassis frame rails
• Moulded front and rear cross members
• Integrated battery tray and electronic mounting positions
• Dual servo mounting locations
• Integrated winch line routing
• Scale fuel cell
• Moulded rock sliders with replaceable outer sections
• Machined aluminium panhard mount
• Incision 80mm S8E shocks (pair) with hard-anodised aluminium bodies, dual X-ring seals, locking preload collars, keyed spring cups, and polished steel shock shafts
• Moulded shock towers with double shear configuration
• Stainless steel suspension links (3-link front and triangulated rear)
• Stainless steel pivot balls
• Stainless steel offset lower shock pivot balls
• Reinforced C-hubs with high caster
• Universal style axle shafts
• One-piece moulded bearing retainers
• Scale removable third member
• 6mm output shafts with M5 wheel nuts
• Extended motor protection skid plate
• Molded VFD Twin transmission housing
• Molded spur gear cover
• Sintered shift arms with brass pivot shift bushings
• Chromoly slide dogs for overdrive and dig shifting
• 32P 52T spur gear and 15T steel pinion
• Silicone dust shields for shift arms
• Machined bearing plates
• Threadlock compound
• 30-weight shock oil
• 7mm to 8mm thin-wall wheel nut adapter tool
• Vanquish 20mm servo horn for steering servo
• Hardware, fasteners, and assembly components

What You Need to Complete

• Electronics: 540 size brushed or brushless motor (see motor compatibility notes), electronic speed controller (ESC) compatible with 540 motors, steering servo, two additional standard-size servos for dig and selectable overdrive control, LiPo or NiMH battery pack, battery charger, radio transmitter and receiver (4-channel recommended for dig and overdrive functionality), and servo horns (24mm servo horns for dig and overdrive servos)
• Mechanical Items: 1.9 inch diameter tyres and wheels (1.9 format is the standard for 1/10 scale crawlers and widely available in the UK), body shell (clear or painted scale replica bodies are commonly available)
• Tools and Consumables: Assembly tools (hex keys, screwdrivers, adjustable wrenches), paint for body shell customisation, additional threadlock and grease for maintenance

Frequently Asked Questions

• Is the Vanquish VS4-10 Portal Axle suitable for beginners to RC rock crawling? — This kit is classified as Skill Level 4, indicating it is designed for experienced builders and operators rather than complete beginners. Building the VS4-10 requires mechanical aptitude, understanding of drivetrain tuning, suspension geometry adjustment, and electronics integration. However, if you have previous RC experience or are willing to invest time in learning, this kit offers tremendous educational value and the reward of piloting one of the most capable crawlers available. Many UK RC clubs and experienced hobbyists choose the VS4-10 specifically because it teaches proper chassis setup and delivers genuine performance improvements as you learn to dial in the transmission overdrive and dig settings.
• What makes portal axles better than straight axles for rock crawling? — Portal axles provide significantly greater ground clearance by mounting the differential higher in the chassis, which reduces hang-ups on obstacles and allows the chassis to clear larger rocks. The portal configuration also lowers the centre of gravity relative to the wheels, improving stability and reducing the risk of rollovers on steep terrain—a critical advantage when crawling technical courses. The Vanquish F10 Portal Axles combine this clearance advantage with a high-pinion hypoid gear setup that improves gear engagement and reduces driveline stress. If you frequently encounter large obstacles, tight rock gardens, or extreme terrain, portal axles deliver tangible performance advantages that justify their complexity.
• What battery does the VS4-10 need? — The kit accepts most standard battery pack sizes thanks to its integrated battery tray design. Hard case LiPo batteries and standard stick pack batteries are both accommodated. The exact voltage and capacity depends on your motor choice, ESC rating, and desired run time. Most 1/10 scale rock crawlers use 2S or 3S LiPo configurations (7.4V or 11.1V respectively), though your motor and ESC specifications will determine your exact requirements. Consult your chosen motor and ESC documentation for battery compatibility details, or contact our team at RC Model Shop for personalised recommendations based on your specific build.
• How does the VFD Twin overdrive shifting actually work? — The VFD Twin transmission accepts on-the-fly overdrive commands from a servo controlled by your transmitter. By flipping a switch, you instantly change the gear ratio from 53.7:1 (standard 6.5% overdrive) to 35.8:1 (high 46% overdrive), or toggle the overdrive neutral position to engage 2WD mode. This allows you to select lower gearing for maximum pulling power on steep climbs, then shift to higher gearing for faster movement across flat terrain, all without stopping to make mechanical adjustments. This capability transforms how you approach different sections of a trail course.
• What is included with the kit and what do I need to buy separately? — The kit includes the complete chassis, drivetrain, suspension, and all structural components. You must provide electronics (motor, ESC, servos, battery, charger, radio), wheels, tyres, body shell, and building tools. This modular approach allows you to select components that match your preferences and budget, rather than being locked into a pre-selected electronics package that may not suit your needs.
• Can I use this kit with brushless motors, or is it brushed only? — The VS4-10 Portal Axle Builders Kit is fully compatible with both brushed and brushless 540 size motors. Most modern RC crawlers favour brushless motors for their efficiency, reliability, and power delivery, though brushed motors remain a budget-friendly alternative. Your motor choice depends on your budget, preferred driving characteristics, and available battery options.
• How does the 3-position dig unit improve performance? — The dig unit locks or partially locks the rear differential, providing three selectable positions: open (normal differential operation for turning), partial (controlled traction), and locked (maximum traction for vertical climbing or extreme manoeuvres). This allows you to adapt to changing terrain without stopping—open diff for high-speed sections, locked diff for maximum climb. The Vanquish Hurtz dig design operates smoothly and reliably without the jerky engagement found in lesser systems.
• What is the difference between the VS4-10 Portal Axle and VS4-10 Straight Axle versions? — The Portal Axle version (VPS09023) features F10 Portal Axles that maximise ground clearance and lower the centre of gravity, making it ideal for extreme technical terrain and rock gardens. The Straight Axle version (VPS09022) uses traditional axle housings that sit lower in the chassis, providing easier maintenance and slightly simpler construction whilst sacrificing ground clearance. Choose Portal Axles if you prioritise obstacle clearance and stability on technical terrain; choose Straight Axles if you prefer accessibility and simpler setup. Both versions use identical VFD Twin transmissions and chassis platforms.
• What is the wheelbase and overall width? — The VS4-10 measures 313mm (12.3 inches) in wheelbase and 200mm (7.87 inches) wide from hex to hex. These proportions provide balanced on-trail performance and visual scale presence, fitting within most body shells designed for modern 1/10 scale crawlers.
• Is this kit waterproof for wet terrain? — The transmission dust shield is not 100% element-proof, meaning water, mud, and debris can potentially enter the drivetrain. The manufacturer recommends regularly checking the transmission via the access cover and adding grease as needed if you operate in wet conditions. This is standard practice across rock crawler builds—the portal axles and suspension components are well-sealed, but the transmission should be inspected and maintained regularly if used in challenging weather or muddy conditions common in UK 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 Vanquish VS4-10 Portal Axle Builders Kit VPS09023 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.