Head to head
Bockmann Portax K vs Brian James C4 Blue
The Brian James C4 Blue is rated 200kg heavier gross.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Brian James C4 Blue is rated 200kg heavier gross.
Specifications side by side
| Bockmann Portax K | Brian James C4 Blue | |
|---|---|---|
| Gross weight | 2400kg | 2,600kg |
| Payload | 1265kg | - |
| Internal length | 3560mm | - |
| Internal width | 1750mm | - |
| Internal height | 2350mm | - |
| Unladen weight | - | 695kg |
| Bed length | - | 5.0m |
| Bed width | - | 2.0m |
Sources: Bockmann Portax K, Brian James C4 Blue. 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 Blue if...
- you want one that is rated 200kg heavier gross
A twin-axle open car transporter built to carry one road or track car behind a family car or 4x4. Track-day drivers and small vehicle traders hire it for moving a single car without the cost of an enclosed trailer.
Full C4 Blue specifications →Common questions
What is the difference between the Bockmann Portax K and the Brian James C4 Blue?
The Brian James C4 Blue is rated 200kg heavier gross. The Bockmann Portax K is a aluminium 2-horse trailer with front exit; the Brian James C4 Blue is a twin-axle car transporter trailer.
Can I tow the Bockmann Portax K or the Brian James C4 Blue 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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