Head to head
Ifor Williams Business Inabox vs Ifor Williams TT3621
The Ifor Williams TT3621 is 910kg lighter empty. The Ifor Williams Business Inabox is 83cm (2.5ft) longer inside and is 23cm wider inside.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Ifor Williams Business Inabox weighs 910kg more empty.
- Internal length: the Ifor Williams Business Inabox is 83cm (2.5ft) longer inside.
- Internal width: the Ifor Williams Business Inabox is 23cm wider inside.
Specifications side by side
| Ifor Williams Business Inabox | Ifor Williams TT3621 | |
|---|---|---|
| Gross weight | 3500kg | 3500kg |
| Unladen weight | 1900kg (Workshop M) | 990kg (195/60R12C tyres) or 1000kg (185/70R13C tyres) |
| Internal length | 4.45m (Workshop M) | 3.62m / 11'9" |
| Internal width | 2.18m | 1.95m / 6'5" |
| Overall length | 5.96m (Workshop M) | - |
| Payload | - | 2510kg (195/60R12C) or 2500kg (185/70R13C) |
Sources: Ifor Williams Business Inabox, Ifor Williams TT3621. 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 83cm (2.5ft) longer inside
- you want one that is 23cm wider 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 TT3621 if...
- you want one that is 910kg lighter empty
The largest Ifor Williams tipper. A 3.6m by 1.95m body is chosen for bulky, lighter loads - green waste, clearance and bark - where volume runs out before weight does, and it is a staple of plant and tool hire fleets. Formerly sold as the TT126.
Listed by
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
- Lancaster trailer hire - ELY
Common questions
What is the difference between the Ifor Williams Business Inabox and the Ifor Williams TT3621?
The Ifor Williams TT3621 is 910kg lighter empty. The Ifor Williams Business Inabox is 83cm (2.5ft) longer inside and is 23cm wider inside. The Ifor Williams Business Inabox is a trailer-based mobile workshop, boxvan or catering/retail unit; the Ifor Williams TT3621 is a twin axle tipping trailer, 12ft body, electric tipping.
Which is lighter, the Ifor Williams Business Inabox or the Ifor Williams TT3621?
The Ifor Williams TT3621. It is 910kg lighter empty than the Ifor Williams Business Inabox.
Can I tow the Ifor Williams Business Inabox or the Ifor Williams TT3621 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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