Head to head
Ifor Williams HB506 vs Ifor Williams TT3621
The Ifor Williams TT3621 is rated 900kg heavier gross and is 28cm wider inside. The Ifor Williams HB506 is 70kg lighter empty.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Ifor Williams TT3621 is rated 900kg heavier gross.
- Internal width: the Ifor Williams TT3621 is 28cm wider inside.
- Internal length: the Ifor Williams TT3621 is 46cm (1.5ft) longer inside.
- Unladen weight: the Ifor Williams TT3621 weighs 70kg more empty.
Specifications side by side
| Ifor Williams HB506 | Ifor Williams TT3621 | |
|---|---|---|
| Gross weight | 2,600kg | 3500kg |
| Unladen weight | 920kg | 990kg (195/60R12C tyres) or 1000kg (185/70R13C tyres) |
| Internal length | 3.16m | 3.62m / 11'9" |
| Internal width | 1.67m | 1.95m / 6'5" |
| Brakes | Braked | - |
| Payload | - | 2510kg (195/60R12C) or 2500kg (185/70R13C) |
Sources: Ifor Williams HB506, Ifor Williams TT3621. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the HB506 if...
- you want one that is 70kg lighter empty
The mainstream two-horse trailer in Britain, used by private owners and small yards. Its comparatively low unladen weight for the class is the practical point: it widens the range of 4x4s and large SUVs that can legally and comfortably tow it.
Listed by
- R M Trailer Centre - Middlesbrough, North Ormesby
- Blains Trailers & Tyres - Hemel Hempstead, Great Gaddesden
- Horse Trailer Sales - Robertsbridge, Staplecross
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
Buy or hire the TT3621 if...
- you want one that is rated 900kg heavier gross
- you want one that is 28cm wider inside
- you want one that is 46cm (1.5ft) 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.
Listed by
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
Common questions
What is the difference between the Ifor Williams HB506 and the Ifor Williams TT3621?
The Ifor Williams TT3621 is rated 900kg heavier gross and is 28cm wider inside. The Ifor Williams HB506 is 70kg lighter empty. The Ifor Williams HB506 is a two-horse trailer, twin axle; the Ifor Williams TT3621 is a twin axle tipping trailer, 12ft body, electric tipping.
Which is lighter, the Ifor Williams HB506 or the Ifor Williams TT3621?
The Ifor Williams HB506. It is 70kg lighter empty than the Ifor Williams TT3621.
Can I tow the Ifor Williams HB506 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.
GetBrent is an independent directory and is not a dealer for, nor affiliated with, either manufacturer. Model and brand names are the trademarks of their owners.