Head to head
Bockmann Big Portax WCF -Stall- vs Ifor Williams HB510XL
The Ifor Williams HB510XL carries 900kg more and is rated 800kg heavier gross. The Bockmann Big Portax WCF -Stall- is 12cm wider inside.
Last reviewed 13 September 2026
Key differences
- Payload: the Ifor Williams HB510XL carries 900kg more.
- Gross weight: the Ifor Williams HB510XL is rated 800kg heavier gross.
- Internal width: the Bockmann Big Portax WCF -Stall- is 12cm wider inside.
- Internal length: the Ifor Williams HB510XL is 10cm longer inside.
Specifications side by side
| Bockmann Big Portax WCF -Stall- | Ifor Williams HB510XL | |
|---|---|---|
| Gross weight | 2700kg | 3500kg |
| Payload | 1310kg | 2210kg |
| Internal length | 4150mm | 4.25m |
| Internal width | 1855mm | 1.74m |
| Internal height | 2400mm | - |
| Unladen weight | - | 1290kg |
Sources: Bockmann Big Portax WCF -Stall-, Ifor Williams HB510XL. 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 12cm 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 HB510XL if...
- you want one that carries 900kg more
- you want one that is rated 800kg heavier gross
- you want one that is 10cm longer inside
For owners of taller or longer horses who find the standard HB511 too tight, giving extra internal length on the same 3500kg chassis so it stays towable by a suitably rated 4x4.
Listed by
- Horse Trailer Sales - Robertsbridge, Staplecross
Common questions
What is the difference between the Bockmann Big Portax WCF -Stall- and the Ifor Williams HB510XL?
The Ifor Williams HB510XL carries 900kg more and is rated 800kg heavier gross. The Bockmann Big Portax WCF -Stall- is 12cm wider inside. The Bockmann Big Portax WCF -Stall- is a large aluminium horse trailer with a stall partition system; the Ifor Williams HB510XL is a an extra-length double horsebox trailer.
Which carries more, the Bockmann Big Portax WCF -Stall- or the Ifor Williams HB510XL?
The Ifor Williams HB510XL, by 900kg.
Can I tow the Bockmann Big Portax WCF -Stall- or the Ifor Williams HB510XL 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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