New Castromax CST-MXW 4 HYDRAULIC EXPANDABLE LOWBED (WIDTH EXTENSION) low bed semi-trailer
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72-TONNE · 4-AXLE · HYDRAULIC WIDTH EXTENSION · SELF-STEERING REAR AXLE
NEW PRODUCTION · DIRECT FROM THE MANUFACTURER · COC AND CE DOCUMENTATION
(PLEASE FIND OUR CATALOGUE ATTACHED IN YOUR LANGUAGE)
Built for demanding heavy-haul operations, the CASTROMAX® CST-MXW 4 LOWBED combines a 72,000 kg payload capacity, four 12-tonne axles, hydraulic platform widening and a durable fixed-platform configuration designed for intensive everyday transport.
The first axle is equipped with an axle-lift system, the second and third axles are fixed, and the fourth axle is self-steering, providing an effective balance between manoeuvrability, tyre life, operational simplicity and maintenance cost.
Unlike fully hydraulically steered or telescopically extendable configurations, this version is engineered for operators who require serious payload capacity and practical manoeuvrability without unnecessary hydraulic steering or extension systems.
CORE SPECIFICATIONS
• Model: CST-MXW 4 LOWBED
• Production year: 2026
• Condition: New
• Payload capacity: 72,000 kg
• Axles: 4 × 12 t
• 1st axle: Lifting
• 2nd axle: Fixed
• 3rd axle: Fixed
• 4th axle: Self-steering
• Suspension: Air suspension
• Platform: Fixed, non-telescopic
• Loading method: Rear loading
• Kingpin plate: 2-inch or 3.5-inch
• Braking: WABCO EBS 2S/2M, dual-circuit electro-pneumatic system with ABS and Roll Stability Support
• Brake compliance: UN ECE R13
• Tyres: 245/70 R17.5 PIRELLI
• Wheels: 16 + 1 spare, with JANTSA rims
• Electrical system: 24 V, 2 × 7-pin and 1 × 15-pin sockets
• Lighting: SABA LED
• Hydraulic power pack: BUCHER, 24 V, 4.7 kW, 27 l/min
• Hydraulic platform widening: 300 mm per side / 600 mm total
• Colour: Customer’s choice; special colours available
DIMENSIONS
• Overall length: 13,600 mm
• Platform length: 8,880 mm
• Overall width: 2,550 mm
• Platform width closed: 2,550 mm
• Platform width hydraulically widened: 3,150 mm
• Hydraulic side extension: 2 × 300 mm
• Platform height in road position: 900 mm
• Kingpin/gooseneck total height: 1,200 mm
• Axle spacing: 1,500 mm
• Wheelbase: 5,380 mm
• Gooseneck length: 4,400 mm
• Front swing width: 1,450 mm
• Rear swing width: 2,130 mm
Dimensions can be revised according to customer requirements and must be confirmed when placing the order.
AXLE CONFIGURATION AND MANOEUVRABILITY
The running gear has been configured for heavy-duty operation while keeping the system mechanically straightforward and easy to maintain.
The first axle is lifting, helping reduce unnecessary tyre wear and rolling resistance when operating under suitable load conditions.
The second and third axles are fixed for maximum stability under heavy loads.
The fourth axle is self-steering, improving manoeuvrability during cornering and reducing tyre scrub compared with a completely fixed four-axle arrangement.
This configuration eliminates the additional hydraulic steering system, steering cylinders, electronic steering controls, encoders and steering PLC architecture required by fully hydraulically steered trailers.
The result is a robust heavy-haul platform designed for operators who prioritize payload capacity, durability, straightforward maintenance and lower system complexity.
HYDRAULIC PLATFORM WIDTH EXTENSION
The loading platform can be hydraulically widened by 300 mm on each side, increasing the total platform width from 2,550 mm to 3,150 mm.
The widening system uses hydraulic cylinders and synchronized flow-control equipment to provide controlled and balanced movement on both sides of the platform.
This allows the trailer to accommodate wider construction machinery, tracked equipment and oversized loads without requiring a permanently wider chassis.
REAR HYDRAULIC LOADING RAMPS
The trailer is designed for rear loading through hydraulic double-folding ramps.
The ramps can hydraulically widen and narrow by 200 mm, providing additional flexibility for machinery with different track widths.
The ramp surfaces incorporate steel and timber sections designed to provide a practical loading surface for construction and heavy machinery.
CHASSIS AND MATERIALS
The chassis is manufactured using certified high-strength structural steels:
• SSAB S700MC PLUS — 700 MPa yield strength
• S690QL — 690 MPa yield strength
• S355J2+N — 355 MPa yield strength
The combination of high-strength structural steels allows CASTROMAX® engineers to optimize chassis strength, load distribution and structural durability for demanding heavy-transport applications.
Running-gear components are designed to remain largely removable and replaceable, simplifying servicing, component replacement, colour customization and spare-parts supply throughout the trailer’s service life.
PAINT PROTECTION
All surfaces are sandblasted before receiving:
• Anti-corrosion epoxy primer
• Two coats of industrial acrylic paint
STANDARD EQUIPMENT
• 1st axle lifting system
• 4th axle self-steering system
• Hydraulic platform widening, 300 mm per side
• Hydraulic double-folding rear ramps
• 200 mm hydraulic lateral adjustment of rear ramps
• WABCO EBS 2S/2M with ABS and Roll Stability Support
• WABCO suspension-control valve with automatic return to ride level
• Axle-group load pressure gauge
• 24 V SABA LED lighting system
• LED side-marker and rear lamps
• 2 × 7-pin and 1 × 15-pin electrical sockets
• Tyre-pressure and temperature monitoring sensors inside every tyre
• Fixed steel rear bumper compliant with UN ECE R58.3
• Side underrun protection compliant with UN ECE R73
• White side and red rear reflective markings compliant with UN ECE R70
• 8 × 2 Ro-Ro lashing rings compliant with EN 29367-2
• One spare wheel and tyre in the same brand and size
• Fire-extinguisher cabinet; extinguisher not included
• JOST mechanical landing legs, 24-tonne technical capacity
OPTIONAL EQUIPMENT
• 2 × 250 mm additional side extensions
• Boat-transport fittings
• Alternative ramp configurations
• Four removable twist locks
• Special colour configurations
• Remote-control / mobile-application functions where applicable
• Customer-specific dimensions
• Customer-specific engineering and equipment
DOCUMENTATION AND COMPLIANCE
Every CASTROMAX® trailer is supplied with COC Certificate of Conformity and CE documentation.
Manufacturing and compliance references include:
• ISO 9001:2015
• ISO 14001:2015
• ISO 45001:2018
• EN ISO 3834-2 welding compliance
• EN 12642 XL load-securing standard
• CE marking
• UN ECE R13 braking compliance
• UN ECE R48 and ADR electrical and lighting requirements
• UN ECE R58.3 rear underrun protection
• UN ECE R73 side protection
• UN ECE R70 reflective markings
Full technical documentation and the TPMS monitoring package are included with every unit.
COMMERCIAL TERMS
• Price: On request
• Delivery terms: EXW Konya, Türkiye
• VAT: 0% for eligible export sales
• Production time: 90 days from receipt of the advance payment
• Warranty: Two-year complete mechanical warranty covering manufacturing defects in structural and mechanical components under normal operating conditions
AFTER-SALES SUPPORT
• Rapid spare-parts dispatch by air freight within three days when required
• Remote technical assistance and video support
• On-site engineering support when required
• Dedicated after-sales contact for your fleet
• Factory visits available before, during and after production in Konya, Türkiye
Send us the dimensions and weight of your machinery, your tractor’s fifth-wheel height, the required options and the destination country.
CASTROMAX® will prepare the correct technical configuration and a competitive commercial quotation for your operation.