Gontrailer SZK221
Built: 2004 · Series: Other models
More machines from model year 2004
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Gontrailer SZK221 – EU category O4 trailer: 22,500 kg gross weight, 5,580 kg unladen weight, 9,550 mm length, 2,550 mm width
With a gross weight of 22,500 kg, the SZK221 falls into EU trailer category O4, the group of heavy trailers above 10 tonnes used in commercial haulage behind lorries or tractor units.
Read on 3 more paragraphs
Unladen weight is 5,580 kg, giving a payload of 16,920 kg – well over three quarters of the gross weight. Length stands at 9,550 mm and width at 2,550 mm, the standard width for road vehicles in Europe. Both figures sit within the usual range for a long, heavy trailer of this class.
Trailers of this weight class run on air brakes; a mechanical overrun brake is no longer permitted above roughly 3.5 tonnes gross weight. The tow vehicle would be a lorry or tractor unit requiring category CE; commercial use brings additional rules on load securing, and the drawbar coupling must be rated for the full nose weight of the loaded trailer.
On a used trailer of this size, what counts is the condition of axles, brake system and linings, the tightness of the air lines, and rust at the frame, drawbar and landing gear. The remaining tyre tread depth, the lighting working along the full length of the body and, where fitted, the ABS/EBS system belong on the check, along with a look at the underrun protection and the wear on the drawbar coupling head. Checking the jockey wheel and its locking mechanism rounds off the inspection.
Sources: SpecCodex-Register: Kennwerte des Modells Gontrailer SZK221
Technical data
Dimensions and weights
| Length | 9,550 mmcorrect |
|---|---|
| Width | 2,550 mmcorrect |
| Wheelbase | 8,100 mmcorrect |
| Unladen weight | 5,580 kgcorrect |
| Gross vehicle weight | 22,500 kgcorrect |
Drivetrain and chassis
| Wheels | 2correct |
|---|---|
| Top speed | 100 km/hcorrect |
Frequently asked questions
How much does the Gontrailer SZK221 weigh?
The unladen weight is 5,580 kg.
What is the gross vehicle weight of the Gontrailer SZK221?
22,500 kg.
Up to what speed is the Gontrailer SZK221 approved?
Approved up to 100 km/h.
What are the dimensions of the Gontrailer SZK221?
9,550 mm × 2,550 mm.
When was the Gontrailer SZK221 built?
Production years: 2004.
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 9 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.
