Head to head
Ifor Williams HB510XL vs Woodford GP Single Axle Box
The Ifor Williams HB510XL is rated 2,750kg heavier gross and is 29cm wider inside.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Ifor Williams HB510XL is rated 2,750kg heavier gross.
- Internal width: the Ifor Williams HB510XL is 29cm wider inside.
Specifications side by side
| Ifor Williams HB510XL | Woodford GP Single Axle Box | |
|---|---|---|
| Gross weight | 3500kg | 750kg (unbraked) |
| Internal width | 1.74m | 1,455mm |
| Unladen weight | 1290kg | - |
| Payload | 2210kg | - |
| Internal length | 4.25m | - |
| Tyres | - | 500x10 6-ply |
| Load bed length | - | 2,100mm to 2,710mm depending on size |
| Floor | - | 12mm phenolic-coated birchwood |
Sources: Ifor Williams HB510XL, Woodford GP Single Axle Box. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the HB510XL if...
- you want one that is rated 2,750kg heavier gross
- you want one that is 29cm 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
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 HB510XL and the Woodford GP Single Axle Box?
The Ifor Williams HB510XL is rated 2,750kg heavier gross and is 29cm wider inside. The Ifor Williams HB510XL is a an extra-length double horsebox trailer; the Woodford GP Single Axle Box is a small single axle box trailer range.
Can I tow the Ifor Williams HB510XL 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.
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.