Head to head
Equi-Trek Sonic Five Seats 3,500kg vs Ifor Williams GP126
The Ifor Williams GP126 is 1,720kg lighter empty.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Equi-Trek Sonic Five Seats 3,500kg weighs 1,720kg more empty.
Specifications side by side
| Equi-Trek Sonic Five Seats 3,500kg | Ifor Williams GP126 | |
|---|---|---|
| Gross weight | 3500kg | 3500kg |
| Unladen weight | 2500kg | 780kg (skids) or 795kg (ramp) |
| Internal length | - | 3.66m/12' |
| Internal width | - | 1.78m/5'10" |
Sources: Equi-Trek Sonic Five Seats 3,500kg, Ifor Williams GP126. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Sonic Five Seats 3,500kg if...
A five-seat cab variant of the Sonic, aimed at families or small teams who want to travel together to competitions rather than sending a second car. It carries the same horse capacity as the standard Sonic.
Listed by
- Trek-Trailers Lincolnshire - Doncaster, Belton
- Trek-Trailers Three Counties - Hereford
Buy or hire the GP126 if...
- you want one that is 1,720kg lighter empty
A twin-axle general purpose trailer from Ifor Williams's plant range, used to carry mini diggers, dumpers and other small plant, or general building materials. Available with loading ramps or skids.
Listed by
- East Midlands Trailers - Leicester, Thrussington
Common questions
What is the difference between the Equi-Trek Sonic Five Seats 3,500kg and the Ifor Williams GP126?
The Ifor Williams GP126 is 1,720kg lighter empty. The Equi-Trek Sonic Five Seats 3,500kg is a 5-seat version of the Sonic motorised horsebox; the Ifor Williams GP126 is a general purpose plant trailer.
Which is lighter, the Equi-Trek Sonic Five Seats 3,500kg or the Ifor Williams GP126?
The Ifor Williams GP126. It is 1,720kg lighter empty than the Equi-Trek Sonic Five Seats 3,500kg.
Can I tow the Equi-Trek Sonic Five Seats 3,500kg or the Ifor Williams GP126 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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