Ny Castromax CST-MX- 3 LOWBED / STEPFRAME låg lastare semitrailer

2026 CASTROMAX® CST-MX-3 LOWBED / STEPFRAME

60-TONNE · 3-AXLE · 500 MM MECHANICAL WIDTH EXTENSION · SELF-STEERING REAR AXLE

NEW PRODUCTION · DIRECT FROM THE MANUFACTURER · CoC & CE DOCUMENTATION

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Built for demanding heavy-haul operations, the CASTROMAX® CST-MX-3 LOWBED combines a 60,000 kg payload capacity, three 12-tonne axles, a 9,000 mm loading platform and a practical 500 mm mechanical side-extension system.

Designed for the transportation of heavy construction machinery, plant equipment, industrial loads, marine craft and other heavy or oversized cargo, the CST-MX-3 provides a straightforward and durable solution for operators who require serious carrying capacity without the complexity of a telescopic or fully hydraulically steered trailer.

The first axle is lifting, the second axle is fixed and the third axle is self-steering, providing an effective combination of stability, manoeuvrability, reduced tyre scrub and practical day-to-day operation.

CORE SPECIFICATIONS

• Model: CST-MX-3 LOWBED
• Production year: 2026
• Condition: New
• Payload capacity: 60,000 kg
• Axles: 3 × 12 t BPW or SAF
• 1st axle: Lifting
• 2nd axle: Fixed
• 3rd axle: Self-steering
• Suspension: Air suspension
• Steering configuration: Standard / rear self-steering axle
• Platform: Fixed, non-telescopic
• Mechanical side extension: 2 × 250 mm / 500 mm total
• Loading method: Rear loading
• Kingpin plate: 2-inch or 3.5-inch
• Braking: WABCO EBS 2S/2M with ABS
• Tyres: 245/70 R17.5 PIRELLI
• Wheels: 12 + 1 spare
• Rims: JANTSA
• Electrical system: 24 V, 2 × 7-pin
• Lighting: SABA LED
• Hydraulic power unit: 24 V, 2.2 kW, 2.5 CC
• Chassis steel: SSAB S700MC PLUS and S355J2+N
• Standard colour: RAL 2004
• Special colours: Available on request

DIMENSIONS

• Overall length: 13,600 mm
• Platform length: 9,000 mm
• Overall width: 2,550 mm
• Mechanical side extension: 2 × 250 mm
• Maximum platform width with side extensions: 3,050 mm
• Platform height: 900 mm
• Wheelbase: 9,350 mm
• Gooseneck length: 4,400 mm
• Gooseneck overall height: 1,200 mm
• Axle spacing: 1,420 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 CST-MX-3 LOWBED uses a practical three-axle running-gear configuration engineered for heavy-duty transport while keeping maintenance requirements and system complexity under control.

The first axle is equipped with an axle-lift system, allowing the axle to be lifted under suitable operating and load conditions.

This can help reduce unnecessary tyre wear and rolling resistance when the full axle group is not required.

The second axle is fixed, providing stability within the axle group.

The third axle is self-steering, improving manoeuvrability during cornering while reducing tyre scrub compared with a completely fixed tridem axle configuration.

This combination makes the CST-MX-3 particularly suitable for operators looking for a robust heavy-equipment transporter with straightforward operation and practical manoeuvrability.

MECHANICAL PLATFORM WIDTH EXTENSION

The standard 2,550 mm loading platform can be mechanically widened by 250 mm on each side.

This increases the usable platform width to approximately 3,050 mm when both extensions are deployed.

The side extensions provide additional support for wider tracked machinery, construction equipment and other loads that exceed the standard transport-platform width.

Unlike a hydraulically widening platform, the mechanical system keeps the structure straightforward and reduces unnecessary hydraulic complexity.

REAR HYDRAULIC LOADING RAMPS

The CST-MX-3 LOWBED is designed for rear loading through hydraulic double-fold loading ramps.

The ramps can hydraulically extend or retract laterally by 200 mm, allowing their position to be adjusted according to the track width of the machinery being loaded.

The loading surfaces are finished with timber and steel sections, creating a practical loading interface for construction machinery, tracked equipment and other heavy plant.

The double-fold design also helps maintain practical ramp geometry while keeping the ramps compact in transport position.

CHASSIS AND MATERIALS

The chassis is manufactured using certified high-strength structural steels:

• SSAB S700MC PLUS — 700 MPa yield strength
• S355J2+N — 355 MPa yield strength

High-strength structural steel allows CASTROMAX® engineers to optimize chassis strength, load distribution and structural durability for demanding heavy-haul applications.

The trailer is engineered around real operating loads rather than simply increasing material thickness, allowing strength and structural performance to be balanced with practical operating weight.

PAINT PROTECTION

The chassis and structural surfaces undergo a complete industrial surface-treatment process.

All surfaces are shot-blasted before receiving:

• Anti-corrosion epoxy primer
• Two coats of industrial acrylic paint

Standard configuration is supplied in RAL 2004.

Alternative customer-specific colours are available on request.

STANDARD EQUIPMENT

• 1st axle lifting system
• 3rd axle self-steering
• 2 × 250 mm mechanical side extensions
• Hydraulic double-fold rear loading ramps
• 200 mm hydraulic lateral ramp adjustment
• BPW or SAF axles
• Air suspension
• WABCO EBS 2S/2M
• ABS braking system
• Roll Stability Support / RSS
• WABCO suspension-control system
• Automatic return-to-ride function
• Axle-group load pressure gauge
• JOST mechanical landing legs
• 24-tonne technical landing-leg support capacity
• Standard yellow and red palm-type air couplings
• 24 V electrical system
• LED side-marker lamps
• SABA rear lamps
• 2 × 7-pin electrical sockets
• 1 × 15-pin electrical socket
• TPMS sensors inside every tyre
• Real-time tyre-pressure monitoring
• Real-time tyre-temperature monitoring
• Fixed steel rear bumper
• Side underrun protection
• White side reflective markings
• Red rear reflective markings
• 8 × 2 Ro-Ro lashing rings
• One spare wheel and tyre
• Fire-extinguisher cabinet; extinguisher not included
• RAL 2004 standard paint finish

OPTIONAL EQUIPMENT

• Boat-carrying apparatus
• Alternative ramp configurations
• Four removable twist locks
• Customer-specific colour configurations
• Remote control / mobile-application functions
• Customer-specific dimensions
• Other special requests
• Customer-specific engineering and equipment

BRAKING AND SAFETY SYSTEMS

The CST-MX-3 LOWBED uses a dual-circuit electro-pneumatic WABCO EBS 2S/2M braking system with ABS and Roll Stability Support.

The braking system is designed in accordance with UN ECE R13 requirements.

The trailer also incorporates monitoring and safety equipment designed for professional heavy-haul operation, including tyre-pressure and temperature monitoring, axle-group load indication and automatic ride-height control.

DOCUMENTATION AND COMPLIANCE

CASTROMAX® 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 electrical and lighting requirements
• ADR electrical requirements
• UN ECE R58.3 rear underrun protection
• UN ECE R73 side underrun protection
• UN ECE R70 reflective markings
• EN 29367-2 Ro-Ro lashing-ring compliance

Full technical documentation and the TPMS monitoring package are supplied with the trailer.

COMMERCIAL TERMS

• Price: On request
• Delivery terms: EXW Konya, Türkiye
• VAT: 0% for eligible export sales
• Production time: Approximately 30 days from receipt of the advance payment
• Payment: 50% advance payment / remaining 50% before shipment
• 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

The CASTROMAX® CST-MX-3 STEPFRAME is designed for operators who need a strong, practical and maintainable heavy-equipment transporter without unnecessary complexity.

60-tonne payload.
Three 12-tonne axles.
9-metre loading platform.
500 mm mechanical width extension.
First axle lift.
Rear self-steering axle.

A straightforward heavy-haul configuration backed by CASTROMAX® engineering.

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.