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Kroll K1,5-28,5/36 PESASP: an O4-class EU trailer with a 34,000 kg gross weight, 13,160 kg kerb weight, a length of 11.90 m and a 7.73 m wheelbase.
At a gross weight of 34,000 kg, the Kroll K1,5-28,5/36 PESASP falls into the EU O4 trailer class, the heavy trailers above 10 tonnes towed behind heavy tractor units in commercial haulage. At 11.90 m long, it ranks among the longer builds in this class, closer to a semi-trailer than to an ordinary drawbar trailer in scale.
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With a kerb weight of 13,160 kg, the payload comes to 20,840 kg, a good three fifths of the gross weight. The comparatively high kerb weight points to a sturdy chassis built for high axle loads rather than for saving weight at every turn. The 7.73 m wheelbase spreads the load over an axle base plausible for this length, and the 2.55 m width matches the European standard width.
As an O4-class vehicle, the trailer needs an air brake system and is towed under a category CE licence. The combination of high payload and sturdy build suits dense, heavy goods such as building materials, bulk material or machine parts, where weight rather than volume sets the limit, and where a stiff frame keeps the load stable during braking.
Buying a used heavy trailer of this type, the axles and suspension deserve particular attention, since high axle loads speed up wear on bearings and leaf springs. It is also worth checking the air system for leaks, the chassis for cracking at the axle mounts, and the coupling for wear from daily use, along with the condition of the tyres given the high loads they routinely carry.
Sources: SpecCodex-Register: Kennwerte des Modells K1,5-28,5/36 PESASP
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