Sah Other models

The body is 9.4 m long and 2.52 m wide. Unladen weight is 6,450 kg, leaving a payload of 19,550 kg. This ratio of length to high payload at compact dimensions is typical of trailers carrying heavy, dense goods on a relatively short load bed, such as building materials or metal parts.

Class O4 requires an air-brake system with its own supply line from the towing vehicle, plus an effective parking brake. The compact length combined with high gross weight calls for a sturdy axle design built for high axle loads. Tractor unit and trailer must be joined by a coupling rated for this axle load. Even at this short length, the frame and axle mounts have to absorb forces comparable to those on considerably longer heavy trailers.

Buyers should check the chassis for distortion and corrosion, especially around the heavily loaded axle mounts, and the brake system including lines and actuators. The load bed should be checked for wear from dense, heavy cargo, the tyres for even wear. Lighting, the electrical connection to the tractor unit and a current roadworthiness certificate are also worth checking.