Head to head
Equi-Trek Sonic Five Seats 3,500kg vs Ifor Williams GX126
The Ifor Williams GX126 is 1,735kg lighter empty.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Equi-Trek Sonic Five Seats 3,500kg weighs 1,735kg more empty.
Specifications side by side
| Equi-Trek Sonic Five Seats 3,500kg | Ifor Williams GX126 | |
|---|---|---|
| Gross weight | 3500kg | 3500kg |
| Unladen weight | 2500kg | 765kg (Skids); 795kg (Ramp) |
| Overall length | - | 5.70m |
| Overall width | - | 2.30m |
| Internal length | - | 3.66m / 12'0" |
| Internal width | - | 1.84m / 6'0" |
| Payload | - | 2735kg (Skids); 2705kg (Ramp) |
| Tyres | - | 155/70R12C |
Sources: Equi-Trek Sonic Five Seats 3,500kg, Ifor Williams GX126. 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 GX126 if...
- you want one that is 1,735kg lighter empty
The GX126 is Ifor Williams' mainstream plant trailer for mini diggers, dumpers and similar machinery on a single-axle-per-side, 3500kg braked chassis. Hirers usually pick the Ramp version for self-loading and the Skids version where a separate loading ramp or forklift is already available.
Full GX126 specifications →Common questions
What is the difference between the Equi-Trek Sonic Five Seats 3,500kg and the Ifor Williams GX126?
The Ifor Williams GX126 is 1,735kg lighter empty. The Equi-Trek Sonic Five Seats 3,500kg is a 5-seat version of the Sonic motorised horsebox; the Ifor Williams GX126 is a a twin-axle plant trailer available in Skids and Ramp variants for carrying machinery..
Which is lighter, the Equi-Trek Sonic Five Seats 3,500kg or the Ifor Williams GX126?
The Ifor Williams GX126. It is 1,735kg 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 GX126 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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