Knapen KOK 455
Built: 1997 · Series: KOK
More machines from model year 1997
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
Knapen KOK – walking-floor semi-trailer from the Dutch manufacturer in Deurne: seven versions with 39,000 to 45,000 kg gross weight for waste and recycling transport
Knapen Trailers was founded in Deurne in 1984 and built the first walking-floor semi-trailer in Europe there; in this system a hydraulically driven floor made of slats pushes the load out without tipping the body. The KOK range covers the brand's closed-box walking-floor semi-trailers in the register, with models such as K.O.K 390, K.O.K. 450, KOK 200, KOK 390 ZG and KOK 455.
Read on 3 more paragraphs
The register lists 7 versions with unladen weights from 7,240 to 8,480 kg, gross weights from 39,000 to 45,000 kg, lengths from 12,030 to 12,500 mm and widths from 2,500 to 2,550 mm.
Walking-floor semi-trailers of this type have become established mainly in the transport of municipal waste, waste paper, compost and similar bulk materials, because they can unload without tipping and without the clearance height a tipper needs; alongside manufacturers such as Fruehauf and Kraker, Knapen is one of the well-known names in this European market. Thanks to their light aluminium construction, semi-trailers of this type maintain a high payload despite their considerable length and heavy-duty walking floor.
When buying used, check the floor slats for wear and smooth movement, the hydraulic cylinders and hoses of the floor drive, and the seals between the floor slats; add to that the frame and body for corrosion caused by aggressive loads, and the axles, brakes and tyres as on any semi-trailer.
Sources: SpecCodex register, model data: Knapen KOK, Knapen Trailers (manufacturer)
Technical data
Dimensions and weights
| Width | 2,500 mmcorrect |
|---|---|
| Wheelbase | 921 mmcorrect |
| Unladen weight | 8,480 kgcorrect |
| Gross vehicle weight | 45,000 kgcorrect |
Drivetrain and chassis
| Top speed | 100 km/hcorrect |
|---|
Frequently asked questions
How much does the Knapen KOK 455 weigh?
The unladen weight is 8,480 kg.
What is the gross vehicle weight of the Knapen KOK 455?
45,000 kg.
Up to what speed is the Knapen KOK 455 approved?
Approved up to 100 km/h.
When was the Knapen KOK 455 built?
Production years: 1997.
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 7 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
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.
