Head to head
Equi-Trek Super Sonic 4T vs Ifor Williams GD85
The Equi-Trek Super Sonic 4T is a horsebox or horse trailer. The Ifor Williams GD85 is a general duty box trailer, single or twin axle.
Last reviewed 13 September 2026
Specifications side by side
| Equi-Trek Super Sonic 4T | Ifor Williams GD85 | |
|---|---|---|
| Brakes | Braked | Braked, auto-reverse over-run |
| Gross weight | - | 1,400kg single axle / 2,700kg twin axle |
| Unladen weight | - | 395kg single axle / 485kg twin axle |
| Internal bed | - | 2.5m x 1.58m (8ft 2in x 5ft 2in) |
Sources: Equi-Trek Super Sonic 4T, Ifor Williams GD85. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Super Sonic 4T if...
Equi-Trek Super Sonic 4T, carried by UK dealers and hire companies listed on GetBrent for sale. Horseboxes and horse trailers like this are chosen by private owners and competition yards moving horses to shows, vets and new yards.
Listed by
- Trek-Trailers Lincolnshire - Doncaster, Belton
- Trek-Trailers Suffolk - Bury Saint Edmunds
- Trek-Trailers Three Counties - Hereford
Buy or hire the GD85 if...
The entry point of the Ifor Williams general duty range and one of the most common working trailers in Britain. Smallholders, gardeners and tradespeople buy it for everyday hauling without needing a heavy tow vehicle, and the twin-axle version roughly doubles the payload for a modest gain in unladen weight.
Full GD85 specifications →Common questions
What is the difference between the Equi-Trek Super Sonic 4T and the Ifor Williams GD85?
The Equi-Trek Super Sonic 4T is a horsebox or horse trailer; the Ifor Williams GD85 is a general duty box trailer, single or twin axle.
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