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Grogg SA – EU category O3 trailer: 6,400 kg gross weight, 2,800 kg unladen weight, 7,250 mm length, 2,300 mm width, 4,200 mm wheelbase
With a gross weight of 6,400 kg, the SA falls into EU trailer category O3, the group of trailers between 3.5 and 10 tonnes.
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Unladen weight is 2,800 kg, giving a payload of 3,600 kg – a good half of the gross weight is available for cargo. Length stands at 7,250 mm, width at 2,300 mm and wheelbase at 4,200 mm.
Air brakes are common from this weight class upward; a mechanical overrun brake reaches its limit above roughly 3.5 tonnes. A width of 2,300 mm, below the permitted maximum, points to a body built for narrower loads. The tow vehicle would be a suitably rated van or lorry.
On a used example, what counts is the condition of the brake system and linings, the tightness of the air lines or, on an electric or hydraulic brake, its control unit, plus rust at the frame, drawbar and axle mounts. Remaining tyre tread depth and working lighting also belong on the check, along with a look at the condition of the drawbar coupling itself. On an electric brake, it is also worth checking the plug and cable routing, since damp here is a common cause of failure. Where the trailer is fitted with a rear tailgate or ramp, the hinges and locking mechanism belong on the check as well, and a straight, unbent drawbar is essential for the overrun mechanism to work correctly. A current inspection record is a further plus point.
Sources: SpecCodex-Register: Kennwerte des Modells Grogg SA
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