Calag Other models

It weighs just 4,060 kg unladen and carries 35,940 kg of payload, close to 90 per cent of its gross weight – an exceptionally high ratio achieved only by a very light construction consistently designed for payload rather than self-weight. With a wheelbase of just 905 mm and six wheels, the axles sit close together as a compact group, as on heavy trailers for bulk goods or building materials, where the load floor is built as low and the axle block as compact as possible.

Trailers of this weight class run with an air-brake system, and towing the combination requires a category CE licence. The compact six-wheel axle group spreads the high axle load over more contact points and keeps the load on each axle within the limits permitted on the road, even though the gross weight far exceeds that of a two-axle design.

On such a lightly built heavy-duty trailer, what counts above all is the condition and tightness of the air suspension at the compact axle group, the state of the brake system and discs or drums, cracks in the frame around the axle mounts, which are heavily stressed at this payload ratio, and the condition and tread depth of the six tyres, which run close to their load limit when fully loaded.