Head to head
Bockmann Portax L K vs Ifor Williams HB510XL
The Ifor Williams HB510XL carries 892kg more and is rated 1 tonnes heavier gross. The Bockmann Portax L K is 1cm wider inside.
Last reviewed 13 September 2026
Key differences
- Payload: the Ifor Williams HB510XL carries 892kg more.
- Gross weight: the Ifor Williams HB510XL is rated 1 tonnes heavier gross.
- Internal length: the Ifor Williams HB510XL is 13cm longer inside.
- Internal width: the Bockmann Portax L K is 1cm wider inside.
Specifications side by side
| Bockmann Portax L K | Ifor Williams HB510XL | |
|---|---|---|
| Gross weight | 2500kg | 3500kg |
| Payload | 1318kg | 2210kg |
| Internal length | 4125mm | 4.25m |
| Internal width | 1750mm | 1.74m |
| Internal height | 2300mm | - |
| Unladen weight | - | 1290kg |
Sources: Bockmann Portax L K, Ifor Williams HB510XL. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Portax L K if...
- you want one that is 1cm wider inside
The longer 'L' version of the Portax K, giving taller or bigger horses more room while keeping the front-exit layout. It appeals to owners of warmbloods or cobs who found the standard Portax K too tight.
Listed by
- Böckmann UK Trailers & Horseboxes - Cinderford, Littledean
Buy or hire the HB510XL if...
- you want one that carries 892kg more
- you want one that is rated 1 tonnes heavier gross
- you want one that is 13cm 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 Portax L K and the Ifor Williams HB510XL?
The Ifor Williams HB510XL carries 892kg more and is rated 1 tonnes heavier gross. The Bockmann Portax L K is 1cm wider inside. The Bockmann Portax L K is a long-wheelbase aluminium 2-horse trailer with front exit; the Ifor Williams HB510XL is a an extra-length double horsebox trailer.
Which carries more, the Bockmann Portax L K or the Ifor Williams HB510XL?
The Ifor Williams HB510XL, by 892kg.
Can I tow the Bockmann Portax L K 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.
GetBrent is an independent directory and is not a dealer for, nor affiliated with, either manufacturer. Model and brand names are the trademarks of their owners.