Head to head
Equi-Trek Sonic Five Seats 3,500kg vs Ifor Williams General Duty
The Equi-Trek Sonic Five Seats 3,500kg is rated 2.1 tonnes heavier gross.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Equi-Trek Sonic Five Seats 3,500kg is rated 2.1 tonnes heavier gross.
Specifications side by side
| Equi-Trek Sonic Five Seats 3,500kg | Ifor Williams General Duty | |
|---|---|---|
| Gross weight | 3500kg | 1400kg to 2700kg depending on model |
| Unladen weight | 2500kg | - |
| Internal length | - | 1.84m (6ft) to 3.71m (12ft 2in) |
| Internal width | - | 1.23m (4ft) to 1.71m (5ft 6in) |
| Axles | - | Single or twin axle |
Sources: Equi-Trek Sonic Five Seats 3,500kg, Ifor Williams General Duty. 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...
- you want one that is rated 2.1 tonnes heavier gross
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 General Duty if...
Ifor Williams's entry-level flatbed range, bought by householders, gardeners and small trades for tip runs, garden waste and general loads. It is the trailer most UK hire yards keep several of, since one size or another suits almost any small job.
Listed by
- John Page Trailers Ltd - Ashford, Biddenden
Common questions
What is the difference between the Equi-Trek Sonic Five Seats 3,500kg and the Ifor Williams General Duty?
The Equi-Trek Sonic Five Seats 3,500kg is rated 2.1 tonnes heavier gross. The Equi-Trek Sonic Five Seats 3,500kg is a 5-seat version of the Sonic motorised horsebox; the Ifor Williams General Duty is a small flatbed/general purpose trailer range.
Can I tow the Equi-Trek Sonic Five Seats 3,500kg or the Ifor Williams General Duty 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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