Ifor Williams
HB510XL
an extra-length double horsebox trailer
Last reviewed 2 November 2026
Where to hire or buy the Ifor Williams HB510XL
Specifications
| Gross weight | 3500kg |
| Unladen weight | 1290kg |
| Payload | 2210kg |
| Internal length | 4.25m |
| Internal width | 1.74m |
Figures taken from the manufacturer: source. Specifications change by model year and configuration - confirm with the supplier before relying on them.
Who uses it
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.
Looking for one?
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