Head to head
Ifor Williams HBX506 vs Ifor Williams TT3621
The Ifor Williams TT3621 carries 775kg more and is rated 900kg heavier gross. The Ifor Williams HBX506 is 125kg lighter empty.
Last reviewed 13 September 2026
Key differences
- Payload: the Ifor Williams TT3621 carries 775kg more.
- Gross weight: the Ifor Williams TT3621 is rated 900kg heavier gross.
- Internal width: the Ifor Williams TT3621 is 28cm wider inside.
- Unladen weight: the Ifor Williams TT3621 weighs 125kg more empty.
- Internal length: the Ifor Williams TT3621 is 36cm (1ft) longer inside.
Specifications side by side
| Ifor Williams HBX506 | Ifor Williams TT3621 | |
|---|---|---|
| Gross weight | 2600kg | 3500kg |
| Unladen weight | 865kg | 990kg (195/60R12C tyres) or 1000kg (185/70R13C tyres) |
| Payload | 1735kg | 2510kg (195/60R12C) or 2500kg (185/70R13C) |
| Internal length | 3.26m | 3.62m / 11'9" |
| Internal width | 1.67m | 1.95m / 6'5" |
Sources: Ifor Williams HBX506, Ifor Williams TT3621. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the HBX506 if...
- you want one that is 125kg lighter empty
A mid-size horsebox for owners moving one or two horses who want the updated HBX styling and features rather than the standard HB range trailer.
Listed by
- R M Trailer Centre - Middlesbrough, North Ormesby
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
Buy or hire the TT3621 if...
- you want one that carries 775kg more
- you want one that is rated 900kg heavier gross
- you want one that is 28cm wider inside
- you want one that is 36cm (1ft) 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.
Listed by
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
Common questions
What is the difference between the Ifor Williams HBX506 and the Ifor Williams TT3621?
The Ifor Williams TT3621 carries 775kg more and is rated 900kg heavier gross. The Ifor Williams HBX506 is 125kg lighter empty. The Ifor Williams HBX506 is a a double horsebox trailer from Ifor Williams' HBX range; the Ifor Williams TT3621 is a twin axle tipping trailer, 12ft body, electric tipping.
Which is lighter, the Ifor Williams HBX506 or the Ifor Williams TT3621?
The Ifor Williams HBX506. It is 125kg lighter empty than the Ifor Williams TT3621.
Which carries more, the Ifor Williams HBX506 or the Ifor Williams TT3621?
The Ifor Williams TT3621, by 775kg.
Can I tow the Ifor Williams HBX506 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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