Head to head
Ifor Williams TT3621 vs Lider 39450
The Ifor Williams TT3621 is rated 2,750kg heavier gross and is 62cm (2ft) wider inside. The Lider 39450 is 740kg lighter empty.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Ifor Williams TT3621 is rated 2,750kg heavier gross.
- Unladen weight: the Ifor Williams TT3621 weighs 740kg more empty.
- Internal width: the Ifor Williams TT3621 is 62cm (2ft) wider inside.
- Internal length: the Ifor Williams TT3621 is 1.11m (3.5ft) longer inside.
Specifications side by side
| Ifor Williams TT3621 | Lider 39450 | |
|---|---|---|
| Gross weight | 3500kg | 750kg |
| Unladen weight | 990kg (195/60R12C tyres) or 1000kg (185/70R13C tyres) | 250kg |
| Internal length | 3.62m / 11'9" | 251cm |
| Internal width | 1.95m / 6'5" | 133cm |
| Payload | 2510kg (195/60R12C) or 2500kg (185/70R13C) | - |
| Internal height | - | 40cm |
| Axles | - | 2 |
| Brakes | - | Unbraked |
Sources: Ifor Williams TT3621, Lider 39450. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the TT3621 if...
- you want one that is rated 2,750kg heavier gross
- you want one that is 62cm (2ft) wider inside
- you want one that is 1.11m (3.5ft) longer inside
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.
Full TT3621 specifications →Buy or hire the 39450 if...
- you want one that is 740kg lighter empty
Gives buyers the stability of a twin-axle trailer for garden and general loads while staying under the unbraked weight limit.
Full 39450 specifications →Common questions
What is the difference between the Ifor Williams TT3621 and the Lider 39450?
The Ifor Williams TT3621 is rated 2,750kg heavier gross and is 62cm (2ft) wider inside. The Lider 39450 is 740kg lighter empty. The Ifor Williams TT3621 is a twin axle tipping trailer, 12ft body, electric tipping; the Lider 39450 is a an unbraked twin-axle wooden-sided general purpose trailer rated at 750kg gross weight..
Which is lighter, the Ifor Williams TT3621 or the Lider 39450?
The Lider 39450. It is 740kg lighter empty than the Ifor Williams TT3621.
Can I tow the Ifor Williams TT3621 or the Lider 39450 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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