Head to head
Humbaur Steely vs Ifor Williams HB403
The Ifor Williams HB403 is rated 850kg heavier gross and carries 203kg more.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Ifor Williams HB403 is rated 850kg heavier gross.
- Payload: the Ifor Williams HB403 carries 203kg more.
Specifications side by side
| Humbaur Steely | Ifor Williams HB403 | |
|---|---|---|
| Gross weight | 750kg | 1600kg |
| Payload | 630kg | 833kg |
| Inner length | 2050mm | - |
| Inner width | 1095mm | - |
| Unladen weight | - | 767kg |
| Internal length | - | 3.08m |
| Internal width | - | 1.30m |
Sources: Humbaur Steely, Ifor Williams HB403. 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 HB403 if...
- you want one that is rated 850kg heavier gross
- you want one that carries 203kg more
The smallest trailer in the HB horsebox range, bought by owners of a single horse or a couple of ponies who want the lightest legal option that can still be towed by a mid-size car.
Listed by
- Horse Trailer Sales - Robertsbridge, Staplecross
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
Common questions
What is the difference between the Humbaur Steely and the Ifor Williams HB403?
The Ifor Williams HB403 is rated 850kg heavier gross and carries 203kg more. 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 HB403 is a a compact single-horse or two-pony horsebox trailer.
Which carries more, the Humbaur Steely or the Ifor Williams HB403?
The Ifor Williams HB403, by 203kg.
Can I tow the Humbaur Steely or the Ifor Williams HB403 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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