Head to head
Ifor Williams GX125 HD vs Ifor Williams HB510XL
The Ifor Williams GX125 HD is 530kg lighter empty and carries 530kg more.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Ifor Williams HB510XL weighs 530kg more empty.
- Payload: the Ifor Williams GX125 HD carries 530kg more.
Specifications side by side
| Ifor Williams GX125 HD | Ifor Williams HB510XL | |
|---|---|---|
| Gross weight | 3500kg | 3500kg |
| Unladen weight | 760kg | 1290kg |
| Payload | 2740kg | 2210kg |
| Internal bed | 3.66m x 1.57m | - |
| Internal length | - | 4.25m |
| Internal width | - | 1.74m |
Sources: Ifor Williams GX125 HD, Ifor Williams HB510XL. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the GX125 HD if...
- you want one that is 530kg lighter empty
- you want one that carries 530kg more
For plant hire firms carrying longer machines such as excavators with extended dipper arms or tracked dumpers that need the extra bed length over the GX105HD.
Listed by
- Blains Trailers & Tyres - Hemel Hempstead, Great Gaddesden
Buy or hire the HB510XL if...
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 Ifor Williams GX125 HD and the Ifor Williams HB510XL?
The Ifor Williams GX125 HD is 530kg lighter empty and carries 530kg more. The Ifor Williams GX125 HD is a a longer heavy-duty plant trailer; the Ifor Williams HB510XL is a an extra-length double horsebox trailer.
Which is lighter, the Ifor Williams GX125 HD or the Ifor Williams HB510XL?
The Ifor Williams GX125 HD. It is 530kg lighter empty than the Ifor Williams HB510XL.
Which carries more, the Ifor Williams GX125 HD or the Ifor Williams HB510XL?
The Ifor Williams GX125 HD, by 530kg.
Can I tow the Ifor Williams GX125 HD 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.
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