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D-W CS20K – heavy EU category O4 trailer with a 32,000 kg gross weight, 3,800 kg unladen weight, 28,200 kg payload, 7.25 m length and a 5.60 m axle spread
At a gross weight of 32,000 kg, the CS20K belongs to EU trailer category O4, the heavy trailers above 10 tonnes towed in freight transport behind correspondingly powerful tractor units. Trailers in this category are fitted as standard with compressed-air brake systems working through multi-axle brake distribution.
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At an unladen weight of 3,800 kg, the payload comes to 28,200 kg, several times the trailer's own weight, which points to a lightweight frame built for high load-bearing capacity. The 7.25 m length is short for this weight class, and the 5.60 m axle spread takes up most of that length, suggesting a compact design built for high payload rather than volume. At 2.50 m width, the CS20K sits within the usual European envelope for road vehicles.
Towing combinations in this weight class require a category CE licence. The brake system is load-dependent, so that a secure braking deceleration is reached even when the trailer is only partly loaded, and the coupling transmits correspondingly high forces to the tractor unit.
When buying used, the axle bearings and their suspension deserve particular attention given the high payload, along with the tightness of the air lines and couplings, the frame for cracking around the axle mounts, and the coupling eye itself for wear and correct free play.
Sources: SpecCodex-Register: Kennwerte des Modells D-W CS20K
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