Head to head
Bockmann Portax L K vs Brian James Race Box
The Brian James Race Box carries 567kg more and is rated 500kg heavier gross. The Bockmann Portax L K is 13cm longer inside.
Last reviewed 13 September 2026
Key differences
- Payload: the Brian James Race Box carries 567kg more.
- Gross weight: the Brian James Race Box is rated 500kg heavier gross.
- Internal width: the Brian James Race Box is 20cm wider inside.
- Internal length: the Bockmann Portax L K is 13cm longer inside.
Specifications side by side
| Bockmann Portax L K | Brian James Race Box | |
|---|---|---|
| Gross weight | 2500kg | 3000kg |
| Payload | 1318kg | up to 1885kg |
| Internal length | 4125mm | 4.0m / 4.5m / 5.0m |
| Internal width | 1750mm | 1.95m |
| Internal height | 2300mm | - |
| Axles | - | Twin |
Sources: Bockmann Portax L K, Brian James Race Box. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Portax L K if...
- you want one that is 13cm longer inside
The longer 'L' version of the Portax K, giving taller or bigger horses more room while keeping the front-exit layout. It appeals to owners of warmbloods or cobs who found the standard Portax K too tight.
Listed by
- Böckmann UK Trailers & Horseboxes - Cinderford, Littledean
Buy or hire the Race Box if...
- you want one that carries 567kg more
- you want one that is rated 500kg heavier gross
- you want one that is 20cm wider inside
Positioned for classic car owners and smaller motorsport teams who want their car fully enclosed and weatherproof but do not need the wider bed of the Race Sport or Race Transporter ranges. The narrower internal width suits a single classic or compact race car rather than a modern GT car.
Listed by
- Formula Trailers,, Brian-James Trailers Main Dealer in the SW UK - Wellington, Poole
Common questions
What is the difference between the Bockmann Portax L K and the Brian James Race Box?
The Brian James Race Box carries 567kg more and is rated 500kg heavier gross. The Bockmann Portax L K is 13cm longer inside. The Bockmann Portax L K is a long-wheelbase aluminium 2-horse trailer with front exit; the Brian James Race Box is a a fully enclosed twin-axle car transporter for classics and small race cars.
Which carries more, the Bockmann Portax L K or the Brian James Race Box?
The Brian James Race Box, by 567kg.
Can I tow the Bockmann Portax L K or the Brian James Race Box 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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