Head to head
Brian James Race Transporter 7 vs Equi-Trek Sonic Five Seats 3,500kg
The Brian James Race Transporter 7 is a the largest race transporter, offered in twin or tri-axle form for heavier vehicles. 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 Race Transporter 7 | Equi-Trek Sonic Five Seats 3,500kg | |
|---|---|---|
| Gross weight | 3500kg | 3500kg |
| Payload | up to 2235kg | - |
| Internal bed | 5.5m / 6.0m long | - |
| Internal width | 2.1m / 2.3m | - |
| Axles | Twin or Tri | - |
| Unladen weight | - | 2500kg |
Sources: Brian James Race Transporter 7, 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 Race Transporter 7 if...
Sits at the top of the Race Transporter range for teams hauling larger or wider vehicles where the Race Transporter 6 is still not wide enough. The twin/tri-axle choice lets buyers trade a little unladen weight against stability at the widest bed option.
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 Race Transporter 7 and the Equi-Trek Sonic Five Seats 3,500kg?
The Brian James Race Transporter 7 is a the largest Race Transporter, offered in twin or tri-axle form for heavier vehicles; the Equi-Trek Sonic Five Seats 3,500kg is a 5-seat version of the Sonic motorised horsebox.
Can I tow the Brian James Race Transporter 7 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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