Schmitz SO1
Built: 1997-2010 · Series: SO1
More machines from model year 1997
Schmitz SO1: three-axle EU class O4 semi-trailer with a gross weight of 39,000 kg and a 9,710 mm axle spread, built from 1997 to 2010.
At a gross weight of 39,000 kg, the SO1 reaches the loading limit typical of three-axle semi-trailers in Europe and belongs to EU trailer class O4. Unlike a classic trailer, a semi-trailer has no front axle of its own, resting instead on the towing tractor's fifth wheel via its kingpin.
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The line was built from 1997 to 2010, staying in the range almost unchanged for over 13 years. With an unladen weight of 7,280 kg, the semi-trailer carries a payload of around 31,720 kg. At 14,040 mm long, 2,550 mm wide, with six wheels and a 9,710 mm spread between kingpin and the three-axle rear group, the design matches the standard semi-trailer used in European long-haul haulage.
Class O4 semi-trailers run on air brakes controlled through the tractor's brake line and require a category CE licence to tow. The long production run points to wide use in haulage traffic and correspondingly good availability of spare parts through the usual semi-trailer suppliers.
Buying a used SO1, the kingpin and its wear plate deserve particular attention, since this is the direct contact point with the fifth wheel. Equally important are checking all three axles and their bearings for play, the air brake system for leaks, and the condition of the chassis around the axle mounts, especially on examples from the earlier build years.
Sources: SpecCodex-Register: Kennwerte des Modells Schmitz SO1
Technical data
Dimensions and weights
| Length | 14,040 mmcorrect |
|---|---|
| Width | 2,550 mmcorrect |
| Wheelbase | 9,710 mmcorrect |
| Unladen weight | 7,280 kgcorrect |
| Gross vehicle weight | 39,000 kgcorrect |
Drivetrain and chassis
| Wheels | 6correct |
|---|---|
| Top speed | 100 km/hcorrect |
Frequently asked questions
How much does the Schmitz SO1 weigh?
The unladen weight is 7,280 kg.
What is the gross vehicle weight of the Schmitz SO1?
39,000 kg.
Up to what speed is the Schmitz SO1 approved?
Approved up to 100 km/h.
What are the dimensions of the Schmitz SO1?
14,040 mm × 2,550 mm.
When was the Schmitz SO1 built?
Production years: 1997-2010.
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.
We do not sell machines. We ask the dealers who carry this model and come back with price and lead time.
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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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Sources: RDW — Dutch national vehicle register (retrieved August 2026) · How we check the data
Trailer in 3D section
Turn the model, look inside and click an assembly — each one is explained.
