Head to head
Equi-Trek Sonic 3,500kg vs Ifor Williams GX125 HD
The Ifor Williams GX125 HD is 1,560kg lighter empty.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Equi-Trek Sonic 3,500kg weighs 1,560kg more empty.
Specifications side by side
| Equi-Trek Sonic 3,500kg | Ifor Williams GX125 HD | |
|---|---|---|
| Gross weight | 3500kg | 3500kg |
| Unladen weight | 2320kg | 760kg |
| Payload | - | 2740kg |
| Internal bed | - | 3.66m x 1.57m |
Sources: Equi-Trek Sonic 3,500kg, Ifor Williams GX125 HD. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Sonic 3,500kg if...
A compact motorised horsebox pitched as easy to drive day to day, for owners of one or two horses who want a small horsebox rather than a trailer and tow car. It is one of Equi-Trek's lower-cost motorised models.
Listed by
- Trek-Trailers Lincolnshire - Doncaster, Belton
- Trek-Trailers Suffolk - Bury Saint Edmunds
- Trek-Trailers Three Counties - Hereford
Buy or hire the GX125 HD if...
- you want one that is 1,560kg lighter empty
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
Common questions
What is the difference between the Equi-Trek Sonic 3,500kg and the Ifor Williams GX125 HD?
The Ifor Williams GX125 HD is 1,560kg lighter empty. The Equi-Trek Sonic 3,500kg is a compact 3.5 tonne motorised 2-horse horsebox; the Ifor Williams GX125 HD is a a longer heavy-duty plant trailer.
Which is lighter, the Equi-Trek Sonic 3,500kg or the Ifor Williams GX125 HD?
The Ifor Williams GX125 HD. It is 1,560kg lighter empty than the Equi-Trek Sonic 3,500kg.
Can I tow the Equi-Trek Sonic 3,500kg or the Ifor Williams GX125 HD 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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