Head to head
Ifor Williams HB511 vs Richardson Trailers Supreme Treble
The Ifor Williams HB511 is 260kg lighter empty.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Richardson Trailers Supreme Treble weighs 260kg more empty.
Specifications side by side
| Ifor Williams HB511 | Richardson Trailers Supreme Treble | |
|---|---|---|
| Gross weight | 2,700kg | 2,700kg |
| Unladen weight | 1,000kg | 1,260kg |
| Internal length | 3.52m | - |
| Internal width | 1.79m | - |
| Brakes | Braked | - |
| Capacity | - | 2 horses forward, 1 pony reversed |
| External dimensions | - | 5.40m long x 2.29m wide x 2.75m high |
| Internal dimensions | - | 3.54m long x 1.80m wide x 2.33m high |
Sources: Ifor Williams HB511, Richardson Trailers Supreme Treble. 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 260kg 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 Treble if...
A three-berth Richardson trailer built for a household with two horses and a pony rather than a full string. The reversed pony bay keeps overall length down compared with three forward-facing berths, which suits smaller yards and tow vehicles.
Listed by
- Horse Trailer Sales - Robertsbridge, Staplecross
Common questions
What is the difference between the Ifor Williams HB511 and the Richardson Trailers Supreme Treble?
The Ifor Williams HB511 is 260kg lighter empty. The Ifor Williams HB511 is a two-horse trailer, twin axle, wider body; the Richardson Trailers Supreme Treble is a trailer for two horses and a pony, one forward one reversed.
Which is lighter, the Ifor Williams HB511 or the Richardson Trailers Supreme Treble?
The Ifor Williams HB511. It is 260kg lighter empty than the Richardson Trailers Supreme Treble.
Can I tow the Ifor Williams HB511 or the Richardson Trailers Supreme Treble 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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