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Car Transporter trailer capacity ranges from 1 to 6 vehicles (12–20t) using ST52/MC700 steel with full hydraulic loading system.

Concrete Mixer capacity ranges from 8 to 14 m³ with integrated mixing and discharge hydraulic systems, built on ST52/MC700 steel.

Flatbed trailers support 25–30 tons general cargo capacity with on-demand hydraulic features, constructed from ST52/MC700 steel.

Lowbed trailers handle 60–100 tons with mechanical axle systems, built from MC700 high-strength steel for heavy machinery transport.

Low Loader trailers support 80–150 tons with detachable gooseneck hydraulics, designed for oversized load transport using MC700 steel.

The core chassis is engineered using S355J2+N high-strength steel. For higher tensile strength and up to 30% weight reduction, Strenx 700E (MC700) is available as an optional upgrade.

Hot-dip galvanization creates a metallurgical bond between zinc and steel, providing superior corrosion resistance compared to paint or powder coating.

All trailers are available with air suspension, mechanical or drum brake options, and comply with European road safety regulations.

Specifications are subject to change. Load capacities may vary based on axle configuration, regional regulations, and specific customization options. All steel grades meet or exceed EN 10025 standards.

Custom engineering solutions are available for specialized transport requirements. Contact STU Trailers for project-specific configurations.

What is the 2-Axle Car Transporter Semi Trailer? The 2-Axle Car Transporter Semi Trailer is a specialized heavy-duty commercial vehicle designed to transport up to six cars simultaneously. It is the 'next generation' of car carrier engineering, introduced on July 30, 2024, focusing on durability and precision logistics. Three-deck system with independent multi-stage hydraulic cylinders: Deck 1 (Gooseneck) with worm-screw spindles, Deck 2 (Middle) with articulated linkage and extension, Deck 3 (Rear) extendable for oversized loads. Built on S355J2+N steel chassis (Strenx 700E optional), 100% hot-dip galvanized, 32,000 kg max laden mass, two 10-ton Gigant drum axles with EBS braking.

What vehicles can be transported on the 6 Car Transporter? The trailer handles diverse vehicle segments: Heavy SUVs (Segment J) like Mercedes AMG G63, Volvo XC90, Audi Q5; Electric & Executive Cars (Segment E) like Tesla Model S, Mercedes E200; Sports Cars (Segment S) like Maserati GranTurismo; and Standard Family Cars (Segment C) like Audi A3. Hydraulic deck system and 32,000 kg capacity allow versatile multi-segment loading configurations. 1,500 mm hydraulic rear bumper extension and aluminum inner ramps create shallow approach angle for low-clearance vehicles.

What steel grades are used in the trailer construction? The core chassis is engineered using S355J2+N high-strength steel to ensure durability under heavy loads. For projects requiring even higher tensile strength and weight reduction (up to 30%), we also offer Strenx 700E (or MC700) as an optional upgrade. S355J2+N provides 355 MPa minimum yield strength. Strenx 700E offers 700 MPa yield strength for maximum strength-to-weight ratio.

How is the chassis protected against corrosion? To ensure a lifespan of over 25 years, 100% of the chassis and its components undergo hot-dip galvanization. This provides long-term protection against environmental wear and rust. Hot-dip galvanization creates a metallurgical bond between zinc and steel, providing superior corrosion resistance compared to paint or powder coating.

How has the hydraulic system been upgraded in the latest generation? We have transitioned from GMS to next-generation Walvoil electro-hydraulic valves for a smoother, more stable operating experience. Additionally, we replaced Rekorsan fittings with Hansa-Flex fittings, ensuring leak-free confidence and more secure sealing under real-world conditions. Walvoil units offer compact architecture and exceptional stability. Hansa-Flex fittings are designed for heavy-duty hydraulic applications.

What type of power unit drives the hydraulic system? The trailer is powered by a Bucher 4.3kW powerpack featuring a 70-liter oil tank. It includes an electronic oil-level sensor and is housed in a unit with side-sliding covers for easy maintenance access even when coupled to a tractor. Bucher Hydraulics is a Swiss manufacturer known for precision hydraulic components used in professional transport applications.

How are the platforms controlled? All hydraulic functions are operated wirelessly via Tele-Radio remote controllers. The system is PLC-controlled and features a 7-inch touch display that provides real-time process monitoring and operational feedback. Programmable Logic Controller (PLC) enables precise sequencing and safety interlocks for all hydraulic operations.

What is the operating pressure and speed of the hydraulic system? The system operates at a pressure of 210 bar, utilizing independent 3-stage multi-stage cylinders to control each deck. This architecture allows for a lift speed of approximately 45 seconds per deck, ensuring rapid loading cycles. Multi-stage cylinders provide extended stroke length while maintaining compact retracted dimensions.

How does the Gooseneck Platform (Deck 1) achieve precise positioning? The Gooseneck platform is not just hydraulically lifted; it is supported by worm-screw spindle mechanisms integrated directly into the gooseneck framework. This hybrid system ensures maximum stability and precise height adjustment for the first vehicle load. Worm-screw spindles provide mechanical locking and fine adjustment capabilities independent of hydraulic pressure.

What prevents hydraulic leaks under heavy vibration? We have upgraded the hydraulic infrastructure to use Hansa-Flex fittings (replacing Rekorsan). These are specifically selected to seal more securely under real-world conditions, providing a quieter, cleaner, and leak-free confidence during transport. Hansa-Flex fittings feature precision-machined sealing surfaces and high-grade materials for vibration resistance.

What safety mechanisms prevent platform failure? We have replaced older mechanically-locked cylinders with a new dual-safety hydraulic valve architecture. This reduces manual steps and increases reliability. Furthermore, the system includes limit sensors on the spindle systems to shield components from unexpected strain. Dual-safety valves provide redundant protection against uncontrolled platform descent.

What is the lifting capacity of the platforms? Each of the three platforms provides an independent lifting capacity of 4,000 kg. The trailer has a technically permissible maximum laden mass of 32,000 kg. Independent hydraulic circuits allow simultaneous or sequential platform operation based on loading requirements.

What are the specifications of the loading winches? The trailer is equipped with two hydraulic winches (positioned front and rear), each rated at 4-ton capacity. They come with 25 meters of steel rope, integrated safety valves, and emergency stop mechanisms. Hydraulic winches provide variable speed control for precise vehicle positioning on steep loading angles.

Can the operator monitor the system status remotely? Yes. The operation is managed via a PLC-controlled Tele-Radio wireless remote that features an integrated 7-inch touch display. This interface provides real-time process monitoring, feedback, and seamless control over the electro-hydraulic valves. Touch display shows hydraulic pressure, platform positions, and system diagnostics in real-time.

How does the lighting system support night operations? Beyond standard road compliance, the trailer is equipped with 6 working LED lights specifically positioned to illuminate the workspace. The entire suite has been upgraded to Aspöck systems, featuring dynamic rear stop lamps and high-visibility side markers to ensure safety in all conditions. Aspöck LED lighting provides improved durability, lower power consumption, and consistent illumination across temperature ranges.

Does the trailer require frequent greasing? Maintenance requirements are minimized significantly. All articulated joints are fitted with IGUS TX1 fibre bushings (sourced from Germany), which allow for grease-free operation. Additionally, platform extensions slide on polyamide sheets for smooth, maintenance-free movement. IGUS TX1 bushings are self-lubricating polymer bearings designed for high-load, low-maintenance applications.

What axles and braking systems are used? The trailer runs on two 10-ton Gigant drum axles with air suspension. Braking is managed by a Wabco or Knorr-Bremse 2S-2M EBS configuration, featuring automatic slack adjusters for enhanced safety. EBS (Electronic Braking System) provides faster response times and improved brake force distribution compared to conventional systems.

What lighting system is equipped on the trailer? We have upgraded from Fristom to a complete Aspöck LED lighting suite. This includes dynamic rear stop lamps, side markers, and 6 working LED lights, providing brighter, more consistent illumination and a cleaner design. Full LED configuration reduces power draw and extends bulb life to 50,000+ hours.

How accessible is the power unit for maintenance? The Bucher powerpack is housed in a unit with side-sliding covers. This design allows mechanics to access the oil tank, filters, and connection hub effortlessly, even when the trailer is still attached to the tractor, minimizing downtime. Slide-access design eliminates the need to disconnect from tractor for routine maintenance tasks.

Do the slide-out platforms require regular lubrication? No. The platform extensions slide on polyamide sheets, and articulated joints are fitted with IGUS TX1 fibre bushings sourced from Germany. These components are designed for grease-free operation, significantly reducing long-term maintenance needs. Polyamide (PA6) sheets provide low friction coefficient and excellent wear resistance under heavy loads.

Is the trailer suitable for loading low-clearance sports cars? Yes. The trailer is engineered to accommodate Segment S (Sports Cars), such as the Maserati GranTurismo. The hydraulic rear bumper extension (1,500 mm) and manually extendable aluminum inner ramps provide a shallow approach angle for smooth entry. Approach angle optimized for vehicles with ground clearance as low as 100mm.

Can the trailer handle heavy SUVs and Electric Vehicles (EVs)? Absolutely. The chassis is optimized for Segment J (SUVs) like the Mercedes AMG G63 and Segment E (Electric) like the Tesla Model S. The 32,000 kg max laden mass and high-strength steel construction ensure it can handle the heavier curb weights associated with modern EVs and SUVs. Platform spacing and deck heights configurable for optimal multi-vehicle loading combinations.

What electrical connections does the truck require? The trailer requires a 24V / 200A NATO socket with a spring cable for the high-current connection needed to run the power pack. It also utilizes 2x7-pin sockets (or a 15-pin socket) for standard lighting and signaling connections. NATO socket provides robust, military-grade connection rated for continuous high-current draw in all weather conditions.

What is the capacity of the on-board air tanks? The braking system is supported by an air reservoir configuration of 80L + 80L + 1L (filter tank). The electrical system runs on a 24V architecture compliant with SAE standards. Dual 80L tanks ensure adequate air supply for multiple brake applications even in emergency situations.

What is Hardox steel and where is it used in trailers? Hardox is a wear-resistant steel manufactured by SSAB, specifically designed for applications requiring exceptional abrasion resistance. Grades vary from 400 to 500 HBW. Typical applications include dump truck bodies and loader buckets. Service life can be 3-5 times longer than conventional steel.

What are the welding requirements for high-strength steels? High-strength steels require specialized welding procedures to maintain mechanical properties and prevent defects, including preheating for thicknesses > 20mm. Welding procedures must be qualified according to EN ISO 15614. Heat input typically limited to 0.8-2.5 kJ/mm.

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