Head to head
Ifor Williams HB510XL vs Richardson Trailers Supreme Treble
The Ifor Williams HB510XL is rated 800kg heavier gross. The Richardson Trailers Supreme Treble is 30kg lighter empty.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Ifor Williams HB510XL is rated 800kg heavier gross.
- Unladen weight: the Ifor Williams HB510XL weighs 30kg more empty.
Specifications side by side
| Ifor Williams HB510XL | Richardson Trailers Supreme Treble | |
|---|---|---|
| Gross weight | 3500kg | 2,700kg |
| Unladen weight | 1290kg | 1,260kg |
| Payload | 2210kg | - |
| Internal length | 4.25m | - |
| Internal width | 1.74m | - |
| 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 HB510XL, Richardson Trailers Supreme Treble. 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 800kg heavier gross
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 Supreme Treble if...
- you want one that is 30kg lighter empty
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 HB510XL and the Richardson Trailers Supreme Treble?
The Ifor Williams HB510XL is rated 800kg heavier gross. The Richardson Trailers Supreme Treble is 30kg lighter empty. The Ifor Williams HB510XL is a an extra-length double horsebox trailer; the Richardson Trailers Supreme Treble is a trailer for two horses and a pony, one forward one reversed.
Which is lighter, the Ifor Williams HB510XL or the Richardson Trailers Supreme Treble?
The Richardson Trailers Supreme Treble. It is 30kg lighter empty than the Ifor Williams HB510XL.
Can I tow the Ifor Williams HB510XL 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.
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.