Head to head
Bockmann Big Portax WCF -Stall- vs Ifor Williams HB511
The Bockmann Big Portax WCF -Stall- is 63cm (2ft) longer inside and is 7cm wider inside.
Last reviewed 13 September 2026
Key differences
- Internal length: the Bockmann Big Portax WCF -Stall- is 63cm (2ft) longer inside.
- Internal width: the Bockmann Big Portax WCF -Stall- is 7cm wider inside.
Specifications side by side
| Bockmann Big Portax WCF -Stall- | Ifor Williams HB511 | |
|---|---|---|
| Gross weight | 2700kg | 2,700kg |
| Internal length | 4150mm | 3.52m |
| Internal width | 1855mm | 1.79m |
| Payload | 1310kg | - |
| Internal height | 2400mm | - |
| Unladen weight | - | 1,000kg |
| Brakes | - | Braked |
Sources: Bockmann Big Portax WCF -Stall-, Ifor Williams HB511. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Big Portax WCF -Stall- if...
- you want one that is 63cm (2ft) longer inside
- you want one that is 7cm wider inside
The largest Portax body with a walk-in tack room and a stall-type partition rather than a fixed centre post, aimed at owners of big horses or those who want to load side by side. It is a step up in space from the standard Big Portax.
Listed by
- Böckmann UK Trailers & Horseboxes - Cinderford, Littledean
Buy or hire the HB511 if...
The wider step up from the HB506, for larger horses or owners who want more room in transit. The extra 12cm of internal width and 36cm of length cost 80kg unladen, which is worth checking against your tow vehicle before choosing it over the HB506.
Listed by
- Trek-Trailers Lincolnshire - Doncaster, Belton
- Trek-Trailers Suffolk - Bury Saint Edmunds
- R M Trailer Centre - Middlesbrough, North Ormesby
- Blains Trailers & Tyres - Hemel Hempstead, Great Gaddesden
- Horse Trailer Sales - Robertsbridge, Staplecross
- Trek-Trailers Three Counties - Hereford
Common questions
What is the difference between the Bockmann Big Portax WCF -Stall- and the Ifor Williams HB511?
The Bockmann Big Portax WCF -Stall- is 63cm (2ft) longer inside and is 7cm wider inside. The Bockmann Big Portax WCF -Stall- is a large aluminium horse trailer with a stall partition system; the Ifor Williams HB511 is a two-horse trailer, twin axle, wider body.
Can I tow the Bockmann Big Portax WCF -Stall- or the Ifor Williams HB511 on a car licence?
Yes, as far as the licence goes. Both are rated at or under 3,500kg gross, and a car (B) licence has covered towing up to 3,500kg since 16 December 2021. Your car still has to be rated to tow the loaded weight - check the handbook or the VIN plate.
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