Head to head
Humbaur Steely vs Ifor Williams HB511
The Ifor Williams HB511 is rated 1,950kg heavier gross.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Ifor Williams HB511 is rated 1,950kg heavier gross.
Specifications side by side
| Humbaur Steely | Ifor Williams HB511 | |
|---|---|---|
| Gross weight | 750kg | 2,700kg |
| Payload | 630kg | - |
| Inner length | 2050mm | - |
| Inner width | 1095mm | - |
| Unladen weight | - | 1,000kg |
| Internal length | - | 3.52m |
| Internal width | - | 1.79m |
| Brakes | - | Braked |
Sources: Humbaur Steely, Ifor Williams HB511. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Steely if...
The Steely is Humbaur's budget single-axle trailer, built with a hot-dip galvanised chassis as what the manufacturer describes as an entry point into trailer ownership. It suits light garden, construction-site and hobby loads rather than heavier trade use.
Full Steely specifications →Buy or hire the HB511 if...
- you want one that is rated 1,950kg heavier gross
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 Lincolnshire - Doncaster, Belton
- 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
Common questions
What is the difference between the Humbaur Steely and the Ifor Williams HB511?
The Ifor Williams HB511 is rated 1,950kg heavier gross. The Humbaur Steely is a a small, unbraked single-axle flatbed trailer aimed at first-time buyers and light garden/site use.; the Ifor Williams HB511 is a two-horse trailer, twin axle, wider body.
Can I tow the Humbaur Steely or the Ifor Williams HB511 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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