Head to head
Ifor Williams HB511 vs Richardson Trailers Supreme Ultra
The Ifor Williams HB511 is 100kg lighter empty. The Richardson Trailers Supreme Ultra is 2cm longer inside and is 1cm wider inside.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Richardson Trailers Supreme Ultra weighs 100kg more empty.
- Internal length: the Richardson Trailers Supreme Ultra is 2cm longer inside.
- Internal width: the Richardson Trailers Supreme Ultra is 1cm wider inside.
Specifications side by side
| Ifor Williams HB511 | Richardson Trailers Supreme Ultra | |
|---|---|---|
| Unladen weight | 1,000kg | 1100 kg |
| Internal length | 3.52m | 3.54 m (11 ft 7 in) |
| Internal width | 1.79m | 1.80 m (5 ft 11 in) |
| Gross weight | 2,700kg | - |
| Brakes | Braked | - |
| Maximum gross weight | - | 3200 kg |
| Overall length | - | 5.00 m (16 ft 5 in) |
Sources: Ifor Williams HB511, Richardson Trailers Supreme Ultra. 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 100kg lighter empty
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 Supreme Ultra if...
- you want one that is 2cm longer inside
- you want one that is 1cm wider 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 HB511 and the Richardson Trailers Supreme Ultra?
The Ifor Williams HB511 is 100kg lighter empty. The Richardson Trailers Supreme Ultra is 2cm longer inside and is 1cm wider inside. The Ifor Williams HB511 is a two-horse trailer, twin axle, wider body; 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 HB511 or the Richardson Trailers Supreme Ultra?
The Ifor Williams HB511. It is 100kg lighter empty than the Richardson Trailers Supreme Ultra.
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.