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2 models in this series
Ktv ULT 39: an O4-class EU trailer with a 39,000 kg gross weight matching its type designation, a 9,030 kg kerb weight and a length of 13.80 m.
The figure 39 in the type designation Ktv ULT 39 matches the 39,000 kg gross weight, a practice common among trailer makers who carry the weight class straight into the model name. The trailer accordingly falls into the EU O4 class, the heavy trailers above 10 tonnes, and needs to be towed accordingly.
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With a kerb weight of 9,030 kg and a length of 13.80 m, the payload comes to 29,970 kg, more than three quarters of the gross weight. For a length of nearly 14 metres that share is high and points to a construction consistently built to save weight wherever the frame allows it. A 9.25 m wheelbase and 2.56 m width complete the picture of a long, slender build.
As an O4-class vehicle, the ULT 39 needs an air brake system and is towed under a category CE licence. The high payload against a low kerb weight suits dense bulk and mass goods, where every kilogram saved on the chassis converts directly into extra cargo carried on each trip, an advantage that adds up over many loaded runs.
Buying a used heavy trailer built for light weight, welds and cross members deserve particular attention, since material savings in the construction can reveal fatigue sooner than on a heavier frame. It is also worth checking the air system, the axle bearings across the long axle base, and the coupling for wear from years of coupling and uncoupling.
Sources: SpecCodex-Register: Kennwerte des Modells ULT 39
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