Model against model
Ifor Williams GD85 vs Ifor Williams HB511
Two models people put on the same shortlist. Every figure below is sourced, and where one side has a specification the other does not publish, the row is left out rather than filled with a guess.
Last reviewed 13 September 2026
| Ifor Williams GD85 | Ifor Williams HB511 | |
|---|---|---|
| Gross weight | 1,400kg single axle / 2,700kg twin axle | 2,700kg |
| Unladen weight | 395kg single axle / 485kg twin axle | 1,000kg |
| Brakes | Braked, auto-reverse over-run | Braked |
Only specifications published for both models appear here. Full Ifor Williams GD85 figures and full Ifor Williams HB511 figures.
Choose the GD85 if...
The entry point of the Ifor Williams general duty range and one of the most common working trailers in Britain. Smallholders, gardeners and tradespeople buy it for everyday hauling without needing a heavy tow vehicle, and the twin-axle version roughly doubles the payload for a modest gain in unladen weight.
Single and twin axle share the same bed size, so the choice is entirely about payload and towing stability rather than capacity.
Full specifications →Choose the HB511 if...
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.
Full specifications →Common questions
What is the difference between the Ifor Williams GD85 and the Ifor Williams HB511?
Ifor Williams GD85: The entry point of the Ifor Williams general duty range and one of the most common working trailers in Britain. Smallholders, gardeners and tradespeople buy it for everyday hauling without needing a heavy tow vehicle, and the twin-axle version roughly doubles the payload for a modest gain in unladen weight. Ifor Williams HB511: 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.
Are these figures reliable?
Every figure on this page was read off a manufacturer or established dealer page and is linked to its source. Anything we could not verify is left out rather than estimated. Specifications change by model year and configuration, so confirm with the supplier before relying on them.
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