Head to head
Bockmann Portax K vs Brian James C4
The Brian James C4 is rated 200kg heavier gross.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Brian James C4 is rated 200kg heavier gross.
Specifications side by side
| Bockmann Portax K | Brian James C4 | |
|---|---|---|
| Gross weight | 2400kg | 2600kg |
| Payload | 1265kg | - |
| Internal length | 3560mm | - |
| Internal width | 1750mm | - |
| Internal height | 2350mm | - |
| Axles | - | Twin |
| Size | - | 2m x 4.5m loading area |
Sources: Bockmann Portax K, Brian James C4. 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 C4 if...
- you want one that is rated 200kg heavier gross
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
Common questions
What is the difference between the Bockmann Portax K and the Brian James C4?
The Brian James C4 is rated 200kg heavier gross. The Bockmann Portax K is a aluminium 2-horse trailer with front exit; the Brian James C4 is a car transporter trailer.
Can I tow the Bockmann Portax K or the Brian James C4 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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