Head to head
Erde PM320 vs Ifor Williams Business Inabox
The Erde PM320 is 1,840kg lighter empty. The Ifor Williams Business Inabox is rated 3.2 tonnes heavier gross.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Ifor Williams Business Inabox weighs 1,840kg more empty.
- Gross weight: the Ifor Williams Business Inabox is rated 3.2 tonnes heavier gross.
Specifications side by side
| Erde PM320 | Ifor Williams Business Inabox | |
|---|---|---|
| Gross weight | 300kg | 3500kg |
| Unladen weight | 60kg | 1900kg (Workshop M) |
| Payload | 236kg | - |
| Internal bed | 200 x 112cm | - |
| Internal length | - | 4.45m (Workshop M) |
| Internal width | - | 2.18m |
| Overall length | - | 5.96m (Workshop M) |
Sources: Erde PM320, Ifor Williams Business Inabox. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the PM320 if...
- you want one that is 1,840kg lighter empty
Near-identical to the PM310, rated for slightly heavier motorcycles up to 236kg. The two are the same trailer to look at, so the number to check before buying is the wet weight of the bike you intend to carry.
Listed by
- 1Stop Trailers Ltd - Sudbury, Little Waldingfield
- Trailer Centre - Rowley Regis
Buy or hire the Business Inabox if...
- you want one that is rated 3.2 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 Erde PM320 and the Ifor Williams Business Inabox?
The Erde PM320 is 1,840kg lighter empty. The Ifor Williams Business Inabox is rated 3.2 tonnes heavier gross. The Erde PM320 is a a small unbraked single-axle trailer for carrying one motorcycle.; the Ifor Williams Business Inabox is a trailer-based mobile workshop, boxvan or catering/retail unit.
Which is lighter, the Erde PM320 or the Ifor Williams Business Inabox?
The Erde PM320. It is 1,840kg lighter empty than the Ifor Williams Business Inabox.
Can I tow the Erde PM320 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.