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Kakerbeck SP4/6.5E: EU class O3 trailer with a gross weight of 6,200 kg, a length of 6.99 m, a 3,830 mm wheelbase and a payload of about 4,040 kg
With a gross weight of 6,200 kg, the SP4/6.5E sits in EU trailer class O3, the band between 3.5 and 10 tonnes. Trailers of this size are towed by light to medium commercial vehicles and are a common middle ground between small, unbraked models and heavy semi-trailers.
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With an unladen weight of 2,160 kg, the trailer carries a payload of around 4,040 kg, nearly twice its own weight. The load area is 6.99 m long, and at 2.32 m it is narrower than the 2.55 m width permitted for road vehicles; the wheelbase is 3,830 mm.
From class O3 upward, EU rules require an air brake rather than a simple overrun brake. The comparatively narrow 2.32 m width may point to use on tighter access routes or to carrying narrower loads, for instance if the trailer was built for operations with limited manoeuvring space. Depending on the towing vehicle, licence category C1E or BE is sufficient to drive it. Trailers in this weight class also need rear underrun protection under UN/ECE Regulation R58, intended to reduce the severity of collisions where a car runs into the back of the trailer.
When buying a used trailer of this size, it is worth checking the load area for deformation and corrosion spots, and the brake lines for leaks. The wheel bearings and suspension should be checked for play, the coupling for wear, and the chassis number should match the registration papers. The rear underrun protection should additionally be checked for secure mounting and any deformation.
Sources: SpecCodex-Register: Kennwerte des Modells SP4/6.5E
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