Head to head
Ifor Williams HB511 vs Woodford GP Single Axle Box
The Ifor Williams HB511 is rated 1,950kg heavier gross and is 34cm (1ft) wider inside.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Ifor Williams HB511 is rated 1,950kg heavier gross.
- Internal width: the Ifor Williams HB511 is 34cm (1ft) wider inside.
Specifications side by side
| Ifor Williams HB511 | Woodford GP Single Axle Box | |
|---|---|---|
| Gross weight | 2,700kg | 750kg (unbraked) |
| Internal width | 1.79m | 1,455mm |
| Unladen weight | 1,000kg | - |
| Internal length | 3.52m | - |
| Brakes | Braked | - |
| Tyres | - | 500x10 6-ply |
| Load bed length | - | 2,100mm to 2,710mm depending on size |
| Floor | - | 12mm phenolic-coated birchwood |
Sources: Ifor Williams HB511, Woodford GP Single Axle Box. 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 rated 1,950kg heavier gross
- you want one that is 34cm (1ft) wider inside
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 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
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
Buy or hire the GP Single Axle Box if...
A small, lidded box trailer bought by tradespeople and households for tools, tip runs and light loads that need weather protection. Its 750kg unbraked rating means almost any car with a towbar can pull it.
Listed by
- Lustre trailers - Norwich
Common questions
What is the difference between the Ifor Williams HB511 and the Woodford GP Single Axle Box?
The Ifor Williams HB511 is rated 1,950kg heavier gross and is 34cm (1ft) wider inside. The Ifor Williams HB511 is a two-horse trailer, twin axle, wider body; the Woodford GP Single Axle Box is a small single axle box trailer range.
Can I tow the Ifor Williams HB511 or the Woodford GP Single Axle Box 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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