Head to head
Bockmann Portax K vs Ifor Williams HBX506
The Ifor Williams HBX506 carries 470kg more and is rated 200kg heavier gross. The Bockmann Portax K is 30cm longer inside and is 8cm wider inside.
Last reviewed 13 September 2026
Key differences
- Payload: the Ifor Williams HBX506 carries 470kg more.
- Internal length: the Bockmann Portax K is 30cm longer inside.
- Gross weight: the Ifor Williams HBX506 is rated 200kg heavier gross.
- Internal width: the Bockmann Portax K is 8cm wider inside.
Specifications side by side
| Bockmann Portax K | Ifor Williams HBX506 | |
|---|---|---|
| Gross weight | 2400kg | 2600kg |
| Payload | 1265kg | 1735kg |
| Internal length | 3560mm | 3.26m |
| Internal width | 1750mm | 1.67m |
| Internal height | 2350mm | - |
| Unladen weight | - | 865kg |
Sources: Bockmann Portax K, Ifor Williams HBX506. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Portax K if...
- you want one that is 30cm longer inside
- you want one that is 8cm wider inside
A mid-range Portax with a front unloading ramp, bought by owners who value being able to lead a horse out the front rather than reversing it out. It sits below the Big Portax models in size and price.
Listed by
- Böckmann UK Trailers & Horseboxes - Cinderford, Littledean
Buy or hire the HBX506 if...
- you want one that carries 470kg more
- you want one that is rated 200kg heavier gross
A mid-size horsebox for owners moving one or two horses who want the updated HBX styling and features rather than the standard HB range trailer.
Listed by
- R M Trailer Centre - Middlesbrough, North Ormesby
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
Common questions
What is the difference between the Bockmann Portax K and the Ifor Williams HBX506?
The Ifor Williams HBX506 carries 470kg more and is rated 200kg heavier gross. The Bockmann Portax K is 30cm longer inside and is 8cm wider inside. The Bockmann Portax K is a aluminium 2-horse trailer with front exit; the Ifor Williams HBX506 is a a double horsebox trailer from Ifor Williams' HBX range.
Which carries more, the Bockmann Portax K or the Ifor Williams HBX506?
The Ifor Williams HBX506, by 470kg.
Can I tow the Bockmann Portax K or the Ifor Williams HBX506 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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