Head to head
Humbaur Steely vs Ifor Williams HB510XL
The Ifor Williams HB510XL is rated 2,750kg heavier gross and carries 1,580kg more.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Ifor Williams HB510XL is rated 2,750kg heavier gross.
- Payload: the Ifor Williams HB510XL carries 1,580kg more.
Specifications side by side
| Humbaur Steely | Ifor Williams HB510XL | |
|---|---|---|
| Gross weight | 750kg | 3500kg |
| Payload | 630kg | 2210kg |
| Inner length | 2050mm | - |
| Inner width | 1095mm | - |
| Unladen weight | - | 1290kg |
| Internal length | - | 4.25m |
| Internal width | - | 1.74m |
Sources: Humbaur Steely, Ifor Williams HB510XL. 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 HB510XL if...
- you want one that is rated 2,750kg heavier gross
- you want one that carries 1,580kg more
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
Common questions
What is the difference between the Humbaur Steely and the Ifor Williams HB510XL?
The Ifor Williams HB510XL is rated 2,750kg heavier gross and carries 1,580kg 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 HB510XL is a an extra-length double horsebox trailer.
Which carries more, the Humbaur Steely or the Ifor Williams HB510XL?
The Ifor Williams HB510XL, by 1,580kg.
Can I tow the Humbaur Steely or the Ifor Williams HB510XL 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.