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Kadatec KA350C: heavy EU class O4 trailer with a gross weight of 41,000 kg, a length of 13.89 m, a 9,080 mm wheelbase, six wheels and a 90 km/h speed limit
With a gross weight of 41,000 kg, the KA350C is among the heaviest vehicles in EU trailer class O4. Trailers in this weight class serve heavy-haulage and building-material transport, where high payload per trip and sturdy axles matter more than high travel speed.
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With an unladen weight of 14,240 kg, the payload comes to around 26,760 kg. The body is 13.89 m long and 2.55 m wide, runs on six wheels, and has a wheelbase of 9,080 mm. Unlike most trailers, the KA350C is limited to 90 km/h, pointing to a chassis built for high axle loads.
Class O4 vehicles carry air brakes as standard, which at this weight and with the six-wheel axle configuration need correspondingly sized brake cylinders and lines. Driving a combination like this requires licence category CE, and the towing vehicle must also be approved for the matching axle load. Trailers in this weight class also need rear underrun protection under UN/ECE Regulation R58, intended to reduce the severity of collisions where a car runs into the back of the trailer.
When buying a used trailer of this size, it is worth checking the axles and wheel bearings for play and heat build-up, the brake drums or discs for wear, and the tyres for even wear across all six wheels. The frame, the kingpin or drawbar eye, and whether the chassis number matches the papers also belong on the checklist. The rear underrun protection should additionally be checked for secure mounting and any deformation.
Sources: SpecCodex-Register: Kennwerte des Modells KA350C
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