Head to head
Ifor Williams HB403 vs Woodford GP Single Axle Box
The Ifor Williams HB403 is rated 850kg heavier gross. The Woodford GP Single Axle Box is 16cm wider inside.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Ifor Williams HB403 is rated 850kg heavier gross.
- Internal width: the Woodford GP Single Axle Box is 16cm wider inside.
Specifications side by side
| Ifor Williams HB403 | Woodford GP Single Axle Box | |
|---|---|---|
| Gross weight | 1600kg | 750kg (unbraked) |
| Internal width | 1.30m | 1,455mm |
| Unladen weight | 767kg | - |
| Payload | 833kg | - |
| Internal length | 3.08m | - |
| Tyres | - | 500x10 6-ply |
| Load bed length | - | 2,100mm to 2,710mm depending on size |
| Floor | - | 12mm phenolic-coated birchwood |
Sources: Ifor Williams HB403, Woodford GP Single Axle Box. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the HB403 if...
- you want one that is rated 850kg heavier gross
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
Buy or hire the GP Single Axle Box if...
- you want one that is 16cm wider inside
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 HB403 and the Woodford GP Single Axle Box?
The Ifor Williams HB403 is rated 850kg heavier gross. The Woodford GP Single Axle Box is 16cm wider inside. The Ifor Williams HB403 is a a compact single-horse or two-pony horsebox trailer; the Woodford GP Single Axle Box is a small single axle box trailer range.
Can I tow the Ifor Williams HB403 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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