Head to head
Bockmann Portax L K vs Ifor Williams Business Inabox
The Ifor Williams Business Inabox is rated 1 tonnes heavier gross and is 43cm (1.5ft) wider inside.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Ifor Williams Business Inabox is rated 1 tonnes heavier gross.
- Internal width: the Ifor Williams Business Inabox is 43cm (1.5ft) wider inside.
- Internal length: the Ifor Williams Business Inabox is 33cm (1ft) longer inside.
Specifications side by side
| Bockmann Portax L K | Ifor Williams Business Inabox | |
|---|---|---|
| Gross weight | 2500kg | 3500kg |
| Internal length | 4125mm | 4.45m (Workshop M) |
| Internal width | 1750mm | 2.18m |
| Payload | 1318kg | - |
| Internal height | 2300mm | - |
| Unladen weight | - | 1900kg (Workshop M) |
| Overall length | - | 5.96m (Workshop M) |
Sources: Bockmann Portax L K, Ifor Williams Business Inabox. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Portax L K if...
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 Business Inabox if...
- you want one that is rated 1 tonnes heavier gross
- you want one that is 43cm (1.5ft) wider inside
- you want one that is 33cm (1ft) longer inside
A trailer shell fitted out as a mobile workshop, shop or catering unit rather than a load carrier. Tradespeople and mobile caterers buy it to take a fitted-out workspace to a site rather than build one into a van.
Listed by
- Norfolk Trailers - Norwich
Common questions
What is the difference between the Bockmann Portax L K and the Ifor Williams Business Inabox?
The Ifor Williams Business Inabox is rated 1 tonnes heavier gross and is 43cm (1.5ft) wider inside. The Bockmann Portax L K is a long-wheelbase aluminium 2-horse trailer with front exit; the Ifor Williams Business Inabox is a trailer-based mobile workshop, boxvan or catering/retail unit.
Can I tow the Bockmann Portax L K or the Ifor Williams Business Inabox 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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