Head to head
Anssems GT500-151 vs Ifor Williams Business Inabox
The Ifor Williams Business Inabox is rated 3 tonnes heavier gross.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Ifor Williams Business Inabox is rated 3 tonnes heavier gross.
Specifications side by side
| Anssems GT500-151 | Ifor Williams Business Inabox | |
|---|---|---|
| Gross weight | 500kg | 3500kg |
| Internal dimensions | 151cm x 101cm x 48cm | - |
| Unladen weight | - | 1900kg (Workshop M) |
| Internal length | - | 4.45m (Workshop M) |
| Internal width | - | 2.18m |
| Overall length | - | 5.96m (Workshop M) |
Sources: Anssems GT500-151, Ifor Williams Business Inabox. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the GT500-151 if...
A light trailer for camping gear, luggage and small DIY loads, towable behind almost any car. The hard-top version is the one most buyers want, because weatherproof and lockable is the whole reason to choose this over a builders trailer.
Full GT500-151 specifications →Buy or hire the Business Inabox if...
- you want one that is rated 3 tonnes heavier gross
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 Anssems GT500-151 and the Ifor Williams Business Inabox?
The Ifor Williams Business Inabox is rated 3 tonnes heavier gross. The Anssems GT500-151 is a small single-axle luggage and general purpose trailer; the Ifor Williams Business Inabox is a trailer-based mobile workshop, boxvan or catering/retail unit.
Can I tow the Anssems GT500-151 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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