Head to head
Bockmann Portax K vs Equi-Trek Sonic Five Seats 3,500kg
The Equi-Trek Sonic Five Seats 3,500kg is rated 1.1 tonnes heavier gross.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Equi-Trek Sonic Five Seats 3,500kg is rated 1.1 tonnes heavier gross.
Specifications side by side
| Bockmann Portax K | Equi-Trek Sonic Five Seats 3,500kg | |
|---|---|---|
| Gross weight | 2400kg | 3500kg |
| Payload | 1265kg | - |
| Internal length | 3560mm | - |
| Internal width | 1750mm | - |
| Internal height | 2350mm | - |
| Unladen weight | - | 2500kg |
Sources: Bockmann Portax K, 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 Portax K if...
A mid-range Portax with a front unloading ramp, bought by owners who value being able to lead a horse out the front rather than reversing it out. It sits below the Big Portax models in size and price.
Listed by
- Böckmann UK Trailers & Horseboxes - Cinderford, Littledean
Buy or hire the Sonic Five Seats 3,500kg if...
- you want one that is rated 1.1 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
Common questions
What is the difference between the Bockmann Portax K and the Equi-Trek Sonic Five Seats 3,500kg?
The Equi-Trek Sonic Five Seats 3,500kg is rated 1.1 tonnes heavier gross. The Bockmann Portax K is a aluminium 2-horse trailer with front exit; the Equi-Trek Sonic Five Seats 3,500kg is a 5-seat version of the Sonic motorised horsebox.
Can I tow the Bockmann Portax K 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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