Head to head
Ifor Williams Business Inabox vs Ifor Williams HB510XL
The Ifor Williams HB510XL is 610kg lighter empty. The Ifor Williams Business Inabox is 44cm (1.5ft) wider inside and is 20cm longer inside.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Ifor Williams Business Inabox weighs 610kg more empty.
- Internal width: the Ifor Williams Business Inabox is 44cm (1.5ft) wider inside.
- Internal length: the Ifor Williams Business Inabox is 20cm longer inside.
Specifications side by side
| Ifor Williams Business Inabox | Ifor Williams HB510XL | |
|---|---|---|
| Gross weight | 3500kg | 3500kg |
| Unladen weight | 1900kg (Workshop M) | 1290kg |
| Internal length | 4.45m (Workshop M) | 4.25m |
| Internal width | 2.18m | 1.74m |
| Overall length | 5.96m (Workshop M) | - |
| Payload | - | 2210kg |
Sources: Ifor Williams Business Inabox, Ifor Williams HB510XL. 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 44cm (1.5ft) wider inside
- you want one that is 20cm 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
Buy or hire the HB510XL if...
- you want one that is 610kg lighter empty
For owners of taller or longer horses who find the standard HB511 too tight, giving extra internal length on the same 3500kg chassis so it stays towable by a suitably rated 4x4.
Listed by
- Horse Trailer Sales - Robertsbridge, Staplecross
Common questions
What is the difference between the Ifor Williams Business Inabox and the Ifor Williams HB510XL?
The Ifor Williams HB510XL is 610kg lighter empty. The Ifor Williams Business Inabox is 44cm (1.5ft) wider inside and is 20cm longer inside. The Ifor Williams Business Inabox is a trailer-based mobile workshop, boxvan or catering/retail unit; the Ifor Williams HB510XL is a an extra-length double horsebox trailer.
Which is lighter, the Ifor Williams Business Inabox or the Ifor Williams HB510XL?
The Ifor Williams HB510XL. It is 610kg lighter empty than the Ifor Williams Business Inabox.
Can I tow the Ifor Williams Business Inabox or the Ifor Williams HB510XL 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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