Saxe Other models

The body is 2.5 m wide, and unladen weight is 3,000 kg. That leaves a high payload of 12,000 kg, a figure pointing to a light structure built for mass rather than volume. The running gear has four wheels; the 0.78 m gap between axles corresponds to the spacing within a tandem-axle group, not the wheelbase of the whole trailer.

Class O4 requires an air-brake system with its own supply line from the towing vehicle, backed up by an effective parking brake. The high payload on four wheels in a tandem arrangement points to dense, heavy cargo such as building materials or metal parts, carried across two closely spaced axles. Tractor unit and trailer must be joined by a coupling rated for this axle load. A tandem group like this also rides more evenly over uneven ground than a single axle carrying the same load.

Buyers should check the tandem-axle group for play in the bearings and even load distribution between the two axles, and the brake system including lines and actuators. The chassis should be checked for distortion and corrosion around the heavily loaded axle mounts, the tyres for even wear. Lighting and a current roadworthiness certificate are also worth checking.