Head to head
Brian James C4 vs Equi-Trek Sonic 3,500kg
The Equi-Trek Sonic 3,500kg is rated 900kg heavier gross.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Equi-Trek Sonic 3,500kg is rated 900kg heavier gross.
Specifications side by side
| Brian James C4 | Equi-Trek Sonic 3,500kg | |
|---|---|---|
| Gross weight | 2600kg | 3500kg |
| Axles | Twin | - |
| Size | 2m x 4.5m loading area | - |
| Unladen weight | - | 2320kg |
Sources: Brian James C4, Equi-Trek Sonic 3,500kg. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the C4 if...
Brian James C4, carried by UK dealers and hire companies listed on GetBrent for hire. Car transporters in this class are hired and bought by track-day drivers, classic car owners and recovery firms who need to move a vehicle without driving it.
Listed by
- Cobham Trailer Hire - Cobham, East Horsley
- R M Trailer Centre - Middlesbrough, North Ormesby
Buy or hire the Sonic 3,500kg if...
- you want one that is rated 900kg heavier gross
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 Three Counties - Hereford
Common questions
What is the difference between the Brian James C4 and the Equi-Trek Sonic 3,500kg?
The Equi-Trek Sonic 3,500kg is rated 900kg heavier gross. The Brian James C4 is a car transporter trailer; the Equi-Trek Sonic 3,500kg is a compact 3.5 tonne motorised 2-horse horsebox.
Can I tow the Brian James C4 or the Equi-Trek Sonic 3,500kg 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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