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Alutrailer 3500 – aluminium class O2 trailer with a 390 kg unladen weight, 3,500 kg gross weight and 8,500 mm length, Finland
The company name Alutrailer points to aluminium as the material, confirmed by the model's unusually low unladen weight: aluminium trailers of the same size weigh considerably less than steel ones. The model is simply designated 3500, matching the gross weight in kilograms — a common practice among trailer makers of naming models after their weight class. The trailer is registered in Finland and dates from 2017.
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At a gross weight of 3,500 kg, the trailer has an unladen weight of only 390 kg, giving a payload of 3,110 kg — nearly 89 percent of the gross weight is thus available for cargo. Length is 8,500 mm at a width of 2,570 mm. For a vehicle of this length, an unladen weight of just 390 kg is exceptionally low.
Class O2 trailers (gross weight up to 3,500 kg) usually run with an overrun brake and can be towed with a category B licence, as long as the combination of towing vehicle and trailer does not exceed the permitted gross combination weight. Such a low unladen weight at 8.5 m length is only achievable with a chassis and body built entirely from aluminium rather than steel, which also considerably reduces susceptibility to corrosion.
When buying an aluminium trailer used, corrosion is less of an issue than on steel vehicles, but fatigue cracks at welds and rivet joints, which age differently in aluminium than in steel, are. The overrun mechanism on the drawbar, axle and wheel bearings, and the lighting and electrical connector should be checked. In the case of accident damage, note that aluminium frames require different repair methods than steel ones, and not every workshop is equipped for it.
Sources: SpecCodex-Register: Kennwerte des Modells Alutrailer 3500
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