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Prestel SF33.5BM: EU category O4 trailer rated at 33,500 kg gross weight, 7,950 mm length, 5,350 mm wheelbase and four wheels for heavy loads
With a gross weight rating of 33,500 kg, the Prestel SF33.5BM belongs to EU trailer category O4, the heavy trailers above 10 tonnes usually fitted with compressed-air brakes and ABS or EBS. The classification into this vehicle category follows the EU type-approval regulation (EU) 2018/858.
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At 7,950 mm long with a 5,350 mm wheelbase on four wheels, the weight is carried on two clearly separated axles. Against an unladen weight of 8,075 kg this leaves a payload of 25,425 kg, at a width of 2,500 mm within the usual European road limit. That leaves roughly 76 per cent of the gross weight rating available as payload.
The combination of a comparatively short length, a long wheelbase and a high gross weight rating is typical of trailers built for heavy, compact loads with a low centre of gravity, such as construction machinery or steel parts. Running it calls for licence category CE on the towing vehicle. The tyres and wheels fitted must be rated for the approved top speed and the registered axle load. Registration also depends on a valid approval certificate matching exactly the values stated here.
Buying one used is worth checking the brake system and the lines running between the two axles, the condition of the axle bearings and leaf springs or air bellows, corrosion at the axle mounts and chassis, and whether the fitted tyres' load rating matches the registered axle load. A complete inspection and service record makes judging the trailer's condition considerably easier.
Sources: SpecCodex-Register: Kennwerte des Modells Prestel SF33.5BM
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