Head to head
Ifor Williams HB506 vs Ifor Williams HB510XL
The Ifor Williams HB506 is 370kg lighter empty. The Ifor Williams HB510XL is rated 900kg heavier gross and is 1.09m (3.5ft) longer inside.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Ifor Williams HB510XL weighs 370kg more empty.
- Gross weight: the Ifor Williams HB510XL is rated 900kg heavier gross.
- Internal length: the Ifor Williams HB510XL is 1.09m (3.5ft) longer inside.
- Internal width: the Ifor Williams HB510XL is 7cm wider inside.
Specifications side by side
| Ifor Williams HB506 | Ifor Williams HB510XL | |
|---|---|---|
| Gross weight | 2,600kg | 3500kg |
| Unladen weight | 920kg | 1290kg |
| Internal length | 3.16m | 4.25m |
| Internal width | 1.67m | 1.74m |
| Brakes | Braked | - |
| Payload | - | 2210kg |
Sources: Ifor Williams HB506, Ifor Williams HB510XL. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the HB506 if...
- you want one that is 370kg lighter empty
The mainstream two-horse trailer in Britain, used by private owners and small yards. Its comparatively low unladen weight for the class is the practical point: it widens the range of 4x4s and large SUVs that can legally and comfortably tow it.
Listed by
- R M Trailer Centre - Middlesbrough, North Ormesby
- Blains Trailers & Tyres - Hemel Hempstead, Great Gaddesden
- Horse Trailer Sales - Robertsbridge, Staplecross
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
Buy or hire the HB510XL if...
- you want one that is rated 900kg heavier gross
- you want one that is 1.09m (3.5ft) longer inside
- you want one that is 7cm wider 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 Ifor Williams HB506 and the Ifor Williams HB510XL?
The Ifor Williams HB506 is 370kg lighter empty. The Ifor Williams HB510XL is rated 900kg heavier gross and is 1.09m (3.5ft) longer inside. The Ifor Williams HB506 is a two-horse trailer, twin axle; the Ifor Williams HB510XL is a an extra-length double horsebox trailer.
Which is lighter, the Ifor Williams HB506 or the Ifor Williams HB510XL?
The Ifor Williams HB506. It is 370kg lighter empty than the Ifor Williams HB510XL.
Can I tow the Ifor Williams HB506 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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