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Roeben: EU class O3 trailer with a gross weight of 4,000 kg, a length of 7,980 mm and a wheelbase of 4,940 mm, built in 1992
With a gross weight of 4,000 kg, this Roeben trailer falls into EU trailer class O3, covering the range from 3,500 kg to 10 tonnes. Trailers in this class sit right at the threshold for compressed-air brakes and are used both in commercial transport and in agricultural work with medium-weight towing vehicles. They carry general cargo, building materials or agricultural goods in a weight range above the light O2 trailers.
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At a length of 7,980 mm and a width of 2,070 mm, the trailer is comparatively narrow, pointing to a body built for specific loads rather than wide pallets. An unladen weight of 1,600 kg allows a payload of around 2,400 kg, more than half of the gross weight. The 4,940 mm wheelbase on four wheels spreads the load across two widely spaced axles, which helps stability under load. The 1992 build year places the trailer before today's trailer brake regulations.
In class O3, depending on the exact gross weight, a trailer's own service brake compatible with the towing vehicle is required. A combination with a trailer of this weight usually needs a category BE or C1E licence, depending on the gross weight of the combination. The narrow build with two widely spaced axles points to a specialised body rather than a general platform trailer.
When buying a trailer from 1992 second-hand, the brake system belongs on a test bench, particularly the brake lines and the overrun brake mechanism if no compressed-air brakes are fitted. The condition of the frame at the axle mounts and the state of the leaf springs show how heavily the trailer was used over three decades. Spare parts for axles, brakes and lighting on such an old trailer are often only available through independent commercial-vehicle parts dealers or as aftermarket replacements.
Sources: SpecCodex-Register: Kennwerte des Modells Roeben
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