Head to head
Bockmann Grand Master SR vs Ifor Williams Business Inabox
The Ifor Williams Business Inabox is rated 800kg 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 800kg heavier gross.
- Internal width: the Ifor Williams Business Inabox is 43cm (1.5ft) wider inside.
- Internal length: the Ifor Williams Business Inabox is 55cm (2ft) longer inside.
Specifications side by side
| Bockmann Grand Master SR | Ifor Williams Business Inabox | |
|---|---|---|
| Gross weight | 2700kg | 3500kg |
| Internal length | 3900mm | 4.45m (Workshop M) |
| Internal width | 1750mm | 2.18m |
| Payload | 1462kg | - |
| Internal height | 2300mm | - |
| Unladen weight | - | 1900kg (Workshop M) |
| Overall length | - | 5.96m (Workshop M) |
Sources: Bockmann Grand Master SR, Ifor Williams Business Inabox. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Grand Master SR if...
The top trim of the Master line, with a walk-in tack room and centre-post partition for owners who want more storage and easier loading than the basic Master. Suits liveries and competition riders travelling one or two larger horses.
Listed by
- Böckmann UK Trailers & Horseboxes - Cinderford, Littledean
Buy or hire the Business Inabox if...
- you want one that is rated 800kg heavier gross
- you want one that is 43cm (1.5ft) wider inside
- you want one that is 55cm (2ft) 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 Grand Master SR and the Ifor Williams Business Inabox?
The Ifor Williams Business Inabox is rated 800kg heavier gross and is 43cm (1.5ft) wider inside. The Bockmann Grand Master SR is a larger polyester 2-horse trailer with walk-in tack room; the Ifor Williams Business Inabox is a trailer-based mobile workshop, boxvan or catering/retail unit.
Can I tow the Bockmann Grand Master SR 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.
GetBrent is an independent directory and is not a dealer for, nor affiliated with, either manufacturer. Model and brand names are the trademarks of their owners.