Head to head
Brian James Digger Plant vs Equi-Trek Sonic Five Seats 3,500kg
The Brian James Digger Plant is a a twin-axle plant trailer built for carrying a mini excavator or similar machine. The Equi-Trek Sonic Five Seats 3,500kg is a 5-seat version of the sonic motorised horsebox.
Last reviewed 13 September 2026
Specifications side by side
| Brian James Digger Plant | Equi-Trek Sonic Five Seats 3,500kg | |
|---|---|---|
| Gross weight | 3500kg | 3500kg |
| Internal bed | 3.2m x 1.7m | - |
| Axles | Twin (12in wheels) | - |
| Unladen weight | - | 2500kg |
Sources: Brian James Digger Plant, Equi-Trek Sonic Five Seats 3,500kg. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Digger Plant if...
Used by groundworkers and plant hire firms to move a mini digger between sites behind a pickup or 4x4. Its bed size and gross weight target machines around the 3 to 3.5 tonne mark rather than heavier plant.
Listed by
- Formula Trailers,, Brian-James Trailers Main Dealer in the SW UK - Wellington, Poole
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
Common questions
What is the difference between the Brian James Digger Plant and the Equi-Trek Sonic Five Seats 3,500kg?
The Brian James Digger Plant is a a twin-axle plant trailer built for carrying a mini excavator or similar machine; the Equi-Trek Sonic Five Seats 3,500kg is a 5-seat version of the Sonic motorised horsebox.
Can I tow the Brian James Digger Plant or the Equi-Trek Sonic Five Seats 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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