Head to head
Ifor Williams Business Inabox vs Richardson Trailers Supreme Treble
The Richardson Trailers Supreme Treble is 640kg lighter empty. The Ifor Williams Business Inabox is rated 800kg heavier gross.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Ifor Williams Business Inabox weighs 640kg more empty.
- Gross weight: the Ifor Williams Business Inabox is rated 800kg heavier gross.
Specifications side by side
| Ifor Williams Business Inabox | Richardson Trailers Supreme Treble | |
|---|---|---|
| Gross weight | 3500kg | 2,700kg |
| Unladen weight | 1900kg (Workshop M) | 1,260kg |
| Internal length | 4.45m (Workshop M) | - |
| Internal width | 2.18m | - |
| Overall length | 5.96m (Workshop M) | - |
| Capacity | - | 2 horses forward, 1 pony reversed |
| External dimensions | - | 5.40m long x 2.29m wide x 2.75m high |
| Internal dimensions | - | 3.54m long x 1.80m wide x 2.33m high |
Sources: Ifor Williams Business Inabox, Richardson Trailers Supreme Treble. 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 rated 800kg 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
Buy or hire the Supreme Treble if...
- you want one that is 640kg lighter empty
A three-berth Richardson trailer built for a household with two horses and a pony rather than a full string. The reversed pony bay keeps overall length down compared with three forward-facing berths, which suits smaller yards and tow vehicles.
Listed by
- Horse Trailer Sales - Robertsbridge, Staplecross
Common questions
What is the difference between the Ifor Williams Business Inabox and the Richardson Trailers Supreme Treble?
The Richardson Trailers Supreme Treble is 640kg lighter empty. The Ifor Williams Business Inabox is rated 800kg heavier gross. The Ifor Williams Business Inabox is a trailer-based mobile workshop, boxvan or catering/retail unit; the Richardson Trailers Supreme Treble is a trailer for two horses and a pony, one forward one reversed.
Which is lighter, the Ifor Williams Business Inabox or the Richardson Trailers Supreme Treble?
The Richardson Trailers Supreme Treble. It is 640kg lighter empty than the Ifor Williams Business Inabox.
Can I tow the Ifor Williams Business Inabox or the Richardson Trailers Supreme Treble 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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