Head to head
Bockmann Portax K vs Ifor Williams Business Inabox
The Ifor Williams Business Inabox is rated 1.1 tonnes heavier gross and is 89cm (3ft) longer inside.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Ifor Williams Business Inabox is rated 1.1 tonnes heavier gross.
- Internal length: the Ifor Williams Business Inabox is 89cm (3ft) longer inside.
- Internal width: the Ifor Williams Business Inabox is 43cm (1.5ft) wider inside.
Specifications side by side
| Bockmann Portax K | Ifor Williams Business Inabox | |
|---|---|---|
| Gross weight | 2400kg | 3500kg |
| Internal length | 3560mm | 4.45m (Workshop M) |
| Internal width | 1750mm | 2.18m |
| Payload | 1265kg | - |
| Internal height | 2350mm | - |
| Unladen weight | - | 1900kg (Workshop M) |
| Overall length | - | 5.96m (Workshop M) |
Sources: Bockmann Portax 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 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 Business Inabox if...
- you want one that is rated 1.1 tonnes heavier gross
- you want one that is 89cm (3ft) longer inside
- you want one that is 43cm (1.5ft) wider 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 K and the Ifor Williams Business Inabox?
The Ifor Williams Business Inabox is rated 1.1 tonnes heavier gross and is 89cm (3ft) longer inside. The Bockmann Portax K is a 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 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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