Head to head
Ifor Williams CT166 vs Ifor Williams HB506
The Ifor Williams CT166 is rated 900kg heavier gross and is 35kg lighter empty.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Ifor Williams CT166 is rated 900kg heavier gross.
- Unladen weight: the Ifor Williams HB506 weighs 35kg more empty.
Specifications side by side
| Ifor Williams CT166 | Ifor Williams HB506 | |
|---|---|---|
| Gross weight | 3500kg | 2,600kg |
| Unladen weight | 885kg | 920kg |
| Payload | 2615kg | - |
| Internal bed | 4.87m x 1.90m | - |
| Internal length | - | 3.16m |
| Internal width | - | 1.67m |
| Brakes | - | Braked |
Sources: Ifor Williams CT166, Ifor Williams HB506. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the CT166 if...
- you want one that is rated 900kg heavier gross
- you want one that is 35kg lighter empty
Bought by garages, recovery operators and plant hire firms who load low vehicles or compact machinery by tilting the deck to ground level instead of driving up loading ramps. The narrower CT166 bed suits standard cars and single machines.
Listed by
- Blains Trailers & Tyres - Hemel Hempstead, Great Gaddesden
Buy or hire the HB506 if...
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
Common questions
What is the difference between the Ifor Williams CT166 and the Ifor Williams HB506?
The Ifor Williams CT166 is rated 900kg heavier gross and is 35kg lighter empty. The Ifor Williams CT166 is a a tilt-bed car and machinery transporter trailer; the Ifor Williams HB506 is a two-horse trailer, twin axle.
Which is lighter, the Ifor Williams CT166 or the Ifor Williams HB506?
The Ifor Williams CT166. It is 35kg lighter empty than the Ifor Williams HB506.
Can I tow the Ifor Williams CT166 or the Ifor Williams HB506 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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