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Roelama RSA 6500: EU class O2 trailer with a gross weight of 3,500 kg, a wheelbase of 4,780 mm and six wheels, built in 2003
With a gross weight of 3,500 kg, the Roelama RSA 6500 falls into EU trailer class O2, the medium-weight trailers up to 3.5 tonnes. Trailers in this class are usually fitted with an overrun brake and can be towed by many vehicles without a compressed-air connection. They mark the upper limit of trailers that can be towed on a category B licence, provided the combination stays within the permitted gross weight.
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An unladen weight of 1,260 kg against a payload of around 2,240 kg means the payload makes up nearly two-thirds of the gross weight. At a width of 2,000 mm, the RSA 6500 is a comparatively narrow trailer. Six wheels on a 4,780 mm wheelbase point to a three-axle chassis with wide axle spacing, giving steady straight-line running and good load distribution. The 2003 build year places the trailer in a generation of modern overrun brakes.
For a combination with a trailer up to 3,500 kg, a category B licence is usually enough, provided the combination's gross weight does not exceed 3,500 kg; otherwise a category BE licence is required. The three-axle design with six wheels distributes the load more evenly than a two-axle design and reduces the load on each axle, which benefits sensitive cargo. The overrun brake engages automatically when the towing vehicle brakes and needs regular checks for smooth operation.
When buying a trailer from 2003 second-hand, the overrun brake mechanism and its linkage are among the most important checks, since wear here leads to late or uneven braking. On a three-axle design, it is worth checking all six wheels for even wear, since misalignment of one axle affects tyre wear on the others. Spare parts for axles and overrun brakes are usually readily available for this common trailer type.
Sources: SpecCodex-Register: Kennwerte des Modells Roelama RSA 6500
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