Head to head
Bockmann Portax L K vs Ifor Williams HB403
The Bockmann Portax L K carries 485kg more and is rated 900kg heavier gross.
Last reviewed 13 September 2026
Key differences
- Payload: the Bockmann Portax L K carries 485kg more.
- Gross weight: the Bockmann Portax L K is rated 900kg heavier gross.
- Internal width: the Bockmann Portax L K is 45cm (1.5ft) wider inside.
- Internal length: the Bockmann Portax L K is 1.04m (3.5ft) longer inside.
Specifications side by side
| Bockmann Portax L K | Ifor Williams HB403 | |
|---|---|---|
| Gross weight | 2500kg | 1600kg |
| Payload | 1318kg | 833kg |
| Internal length | 4125mm | 3.08m |
| Internal width | 1750mm | 1.30m |
| Internal height | 2300mm | - |
| Unladen weight | - | 767kg |
Sources: Bockmann Portax L K, Ifor Williams HB403. 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 carries 485kg more
- you want one that is rated 900kg heavier gross
- you want one that is 45cm (1.5ft) wider inside
- you want one that is 1.04m (3.5ft) longer 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 HB403 if...
The smallest trailer in the HB horsebox range, bought by owners of a single horse or a couple of ponies who want the lightest legal option that can still be towed by a mid-size car.
Listed by
- Horse Trailer Sales - Robertsbridge, Staplecross
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
Common questions
What is the difference between the Bockmann Portax L K and the Ifor Williams HB403?
The Bockmann Portax L K carries 485kg more and is rated 900kg heavier gross. The Bockmann Portax L K is a long-wheelbase aluminium 2-horse trailer with front exit; the Ifor Williams HB403 is a a compact single-horse or two-pony horsebox trailer.
Which carries more, the Bockmann Portax L K or the Ifor Williams HB403?
The Bockmann Portax L K, by 485kg.
Can I tow the Bockmann Portax L K or the Ifor Williams HB403 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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