Head to head
Ifor Williams HB403 vs Richardson Trailers Supreme Ultra
The Ifor Williams HB403 is 333kg lighter empty. The Richardson Trailers Supreme Ultra is 50cm (1.5ft) wider inside and is 46cm (1.5ft) longer inside.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Richardson Trailers Supreme Ultra weighs 333kg more empty.
- Internal width: the Richardson Trailers Supreme Ultra is 50cm (1.5ft) wider inside.
- Internal length: the Richardson Trailers Supreme Ultra is 46cm (1.5ft) longer inside.
Specifications side by side
| Ifor Williams HB403 | Richardson Trailers Supreme Ultra | |
|---|---|---|
| Unladen weight | 767kg | 1100 kg |
| Internal length | 3.08m | 3.54 m (11 ft 7 in) |
| Internal width | 1.30m | 1.80 m (5 ft 11 in) |
| Gross weight | 1600kg | - |
| Payload | 833kg | - |
| Maximum gross weight | - | 3200 kg |
| Overall length | - | 5.00 m (16 ft 5 in) |
Sources: Ifor Williams HB403, Richardson Trailers Supreme Ultra. 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 333kg lighter empty
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 Supreme Ultra if...
- you want one that is 50cm (1.5ft) wider inside
- you want one that is 46cm (1.5ft) longer inside
The Supreme Ultra suits owners looking for a well-established British-built two-horse trailer able to carry a pair of taller horses, since sellers describe it as taking two horses up to about 17.2hh. As a long-running Richardson model it is more often found on the used market now than ordered new.
Listed by
- Horse Trailer Sales - Robertsbridge, Staplecross
Common questions
What is the difference between the Ifor Williams HB403 and the Richardson Trailers Supreme Ultra?
The Ifor Williams HB403 is 333kg lighter empty. The Richardson Trailers Supreme Ultra is 50cm (1.5ft) wider inside and is 46cm (1.5ft) longer inside. The Ifor Williams HB403 is a a compact single-horse or two-pony horsebox trailer; the Richardson Trailers Supreme Ultra is a a two-horse trailer from British manufacturer Richardson, part of its Supreme range of horse trailers..
Which is lighter, the Ifor Williams HB403 or the Richardson Trailers Supreme Ultra?
The Ifor Williams HB403. It is 333kg lighter empty than the Richardson Trailers Supreme Ultra.
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