Head to head
Ifor Williams HB511 vs Ifor Williams HBX506
The Ifor Williams HBX506 is 135kg lighter empty. The Ifor Williams HB511 is 26cm longer inside and is 12cm wider inside.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Ifor Williams HB511 weighs 135kg more empty.
- Internal length: the Ifor Williams HB511 is 26cm longer inside.
- Internal width: the Ifor Williams HB511 is 12cm wider inside.
- Gross weight: the Ifor Williams HB511 is rated 100kg heavier gross.
Specifications side by side
| Ifor Williams HB511 | Ifor Williams HBX506 | |
|---|---|---|
| Gross weight | 2,700kg | 2600kg |
| Unladen weight | 1,000kg | 865kg |
| Internal length | 3.52m | 3.26m |
| Internal width | 1.79m | 1.67m |
| Brakes | Braked | - |
| Payload | - | 1735kg |
Sources: Ifor Williams HB511, Ifor Williams HBX506. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the HB511 if...
- you want one that is 26cm longer inside
- you want one that is 12cm wider inside
- you want one that is rated 100kg heavier gross
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
Buy or hire the HBX506 if...
- you want one that is 135kg lighter empty
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 Ifor Williams HB511 and the Ifor Williams HBX506?
The Ifor Williams HBX506 is 135kg lighter empty. The Ifor Williams HB511 is 26cm longer inside and is 12cm wider inside. The Ifor Williams HB511 is a two-horse trailer, twin axle, wider body; the Ifor Williams HBX506 is a a double horsebox trailer from Ifor Williams' HBX range.
Which is lighter, the Ifor Williams HB511 or the Ifor Williams HBX506?
The Ifor Williams HBX506. It is 135kg lighter empty than the Ifor Williams HB511.
Can I tow the Ifor Williams HB511 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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