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Rsm Ferrotrailer – EU class O4 trailer with a 39,000 kg gross weight, six-wheel running gear and a limited 90 km/h top speed
With a gross weight of 39,000 kg the Ferrotrailer falls into EU trailer class O4, the heavy trailers above 10 tonnes. Vehicles in this class run air brakes and are pulled by heavy articulated tractor units in long-haul or bulk-goods transport.
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The body is 11.17 m long and 2.55 m wide, running on six wheels. Unladen weight is 6,840 kg, leaving a high payload of 32,160 kg – a figure pointing to a light structure built for mass rather than volume, such as bulk goods or steel products. The 7.7 m wheelbase spreads that heavy load evenly across three axles. Top speed is capped at 90 km/h, common for many heavy trailer combinations.
Class O4 requires an air-brake system with its own supply line from the towing vehicle, plus a parking brake for when detached. The high payload against a comparatively low unladen weight points to a sturdy but weight-optimised frame, needed for dense loads such as metal, gravel or building materials. Tractor unit and trailer must be joined by a coupling rated for the axle load involved.
Buyers should check the chassis for distortion and corrosion, especially around the three axles and their suspension, and the brake system including lines and actuators. The load bed should be checked for wear from dense, heavy cargo, and the tyres for even wear across all six wheels. Lighting, the electrical connection to the tractor unit and a current roadworthiness certificate are also worth checking.
Sources: SpecCodex-Register: Kennwerte des Modells FERROTRAILER
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Trailer in 3D section
Turn the model, look inside and click an assembly — each one is explained.
