Sirius S 77 ALU
Built: 2020–2021 · Series: Other models
More machines from model year 2020
Not the right version? The data comes from vehicle registers holding many near-identical versions side by side. Photograph the data plate — we read make and type from it. Open the scanner e-mail address required
Sirius – other models: collection page for boat and multi-purpose trailers with aluminium versions, 510 to 1,520 kg kerb weight, up to 3,500 kg gross weight
Sirius manufactures boat and multi-purpose trailers, whose type designations range from simple letter-number combinations such as G 305 or S 90 to the ALU suffix for versions with an aluminium frame or deck. This collection page lists the versions that could not be assigned to any named series, from compact trailers for small boats to larger multi-purpose models.
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The register lists 21 versions with a kerb weight of 510 to 1,520 kg and a gross weight of 1,300 to 3,500 kg. Length ranges from 3,920 to 7,430 mm, and width from 1,920 to 2,480 mm.
Aluminium construction weighs less than a steel frame for the same payload and does not rust, an advantage particularly for boat trailers that are regularly submerged wheel-deep in water. The market for such trailers is strongly seasonal and serves both private boat and watersports owners and charter operators.
When buying used with an aluminium frame, check for cracks at the welds and contact corrosion at steel-to-aluminium transitions, especially at the axle mounts. Wheel bearings should be inspected particularly carefully and re-greased regularly due to frequent water contact; spare parts for axles and brakes come from the general trailer trade, while special aluminium parts more often come from the manufacturer itself.
Technical data
Dimensions and weights
| Length | 4,730 mmcorrect |
|---|---|
| Width | 2,230 mmcorrect |
| Wheelbase | 3,800 mmcorrect |
| Unladen weight | 985 kgcorrect |
| Gross vehicle weight | 2,500 kgcorrect |
Drivetrain and chassis
| Wheels | 4correct |
|---|---|
| Top speed | 140 km/hcorrect |
Frequently asked questions
How much does the Sirius S 77 ALU weigh?
The unladen weight is 985 kg.
What is the gross vehicle weight of the Sirius S 77 ALU?
2,500 kg.
Up to what speed is the Sirius S 77 ALU approved?
Approved up to 140 km/h.
What are the dimensions of the Sirius S 77 ALU?
4,730 mm × 2,230 mm.
When was the Sirius S 77 ALU built?
Production years: 2020–2021.
What to check before buying
- Search the frame and welds at the axle mounts — that is where cracks start.
- Check the brakes and the last inspection in the papers.
- Work the gross weight against the towing vehicle before buying.
- Compare the chassis number with the papers.
- Look at the floor, cover or body from the inside — rust does not show from outside.
A general list for this type of machine — no substitute for an inspection or an appraiser.
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This page carries 10 individual figures for this model. They come from 1 recorded source; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.
The technical data on this page comes from official vehicle registration records (RDW/Traficom), not from the manufacturer.
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Other models in this series
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Trailer in 3D section
Turn the model, look inside and click an assembly — each one is explained.