Head to head
Bockmann Portax L K vs Ifor Williams TT3621
The Ifor Williams TT3621 carries 1,192kg more and is rated 1 tonnes heavier gross. The Bockmann Portax L K is 51cm (1.5ft) longer inside.
Last reviewed 13 September 2026
Key differences
- Payload: the Ifor Williams TT3621 carries 1,192kg more.
- Gross weight: the Ifor Williams TT3621 is rated 1 tonnes heavier gross.
- Internal length: the Bockmann Portax L K is 51cm (1.5ft) longer inside.
- Internal width: the Ifor Williams TT3621 is 20cm wider inside.
Specifications side by side
| Bockmann Portax L K | Ifor Williams TT3621 | |
|---|---|---|
| Gross weight | 2500kg | 3500kg |
| Payload | 1318kg | 2510kg (195/60R12C) or 2500kg (185/70R13C) |
| Internal length | 4125mm | 3.62m / 11'9" |
| Internal width | 1750mm | 1.95m / 6'5" |
| Internal height | 2300mm | - |
| Unladen weight | - | 990kg (195/60R12C tyres) or 1000kg (185/70R13C tyres) |
Sources: Bockmann Portax L K, Ifor Williams TT3621. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Portax L K if...
- you want one that is 51cm (1.5ft) longer inside
The longer 'L' version of the Portax K, giving taller or bigger horses more room while keeping the front-exit layout. It appeals to owners of warmbloods or cobs who found the standard Portax K too tight.
Full Portax L K specifications →Buy or hire the TT3621 if...
- you want one that carries 1,192kg more
- you want one that is rated 1 tonnes heavier gross
- you want one that is 20cm wider 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 →Common questions
What is the difference between the Bockmann Portax L K and the Ifor Williams TT3621?
The Ifor Williams TT3621 carries 1,192kg more and is rated 1 tonnes heavier gross. The Bockmann Portax L K is 51cm (1.5ft) longer inside. The Bockmann Portax L K is a long-wheelbase aluminium 2-horse trailer with front exit; the Ifor Williams TT3621 is a twin axle tipping trailer, 12ft body, electric tipping.
Which carries more, the Bockmann Portax L K or the Ifor Williams TT3621?
The Ifor Williams TT3621, by 1,192kg.
Can I tow the Bockmann Portax L K 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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