Head to head
Ifor Williams Business Inabox vs Ifor Williams HB506
The Ifor Williams HB506 is 980kg lighter empty. The Ifor Williams Business Inabox is 1.29m (4ft) longer inside and is rated 900kg heavier gross.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Ifor Williams Business Inabox weighs 980kg more empty.
- Internal length: the Ifor Williams Business Inabox is 1.29m (4ft) longer inside.
- Gross weight: the Ifor Williams Business Inabox is rated 900kg heavier gross.
- Internal width: the Ifor Williams Business Inabox is 51cm (1.5ft) wider inside.
Specifications side by side
| Ifor Williams Business Inabox | Ifor Williams HB506 | |
|---|---|---|
| Gross weight | 3500kg | 2,600kg |
| Unladen weight | 1900kg (Workshop M) | 920kg |
| Internal length | 4.45m (Workshop M) | 3.16m |
| Internal width | 2.18m | 1.67m |
| Overall length | 5.96m (Workshop M) | - |
| Brakes | - | Braked |
Sources: Ifor Williams Business Inabox, Ifor Williams HB506. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Business Inabox if...
- you want one that is 1.29m (4ft) longer inside
- you want one that is rated 900kg heavier gross
- you want one that is 51cm (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
Buy or hire the HB506 if...
- you want one that is 980kg lighter empty
The mainstream two-horse trailer in Britain, used by private owners and small yards. Its comparatively low unladen weight for the class is the practical point: it widens the range of 4x4s and large SUVs that can legally and comfortably tow it.
Listed by
- Blains Trailers & Tyres - Hemel Hempstead, Great Gaddesden
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
- Horse Trailer Sales - Robertsbridge, Staplecross
- R M Trailer Centre - Middlesbrough, North Ormesby
Common questions
What is the difference between the Ifor Williams Business Inabox and the Ifor Williams HB506?
The Ifor Williams HB506 is 980kg lighter empty. The Ifor Williams Business Inabox is 1.29m (4ft) longer inside and is rated 900kg heavier gross. The Ifor Williams Business Inabox is a trailer-based mobile workshop, boxvan or catering/retail unit; the Ifor Williams HB506 is a two-horse trailer, twin axle.
Which is lighter, the Ifor Williams Business Inabox or the Ifor Williams HB506?
The Ifor Williams HB506. It is 980kg lighter empty than the Ifor Williams Business Inabox.
Can I tow the Ifor Williams Business Inabox or the Ifor Williams HB506 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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