Head to head
Ifor Williams CT166 vs Ifor Williams HBX506
The Ifor Williams CT166 carries 880kg more and is rated 900kg heavier gross. The Ifor Williams HBX506 is 20kg lighter empty.
Last reviewed 13 September 2026
Key differences
- Payload: the Ifor Williams CT166 carries 880kg more.
- Gross weight: the Ifor Williams CT166 is rated 900kg heavier gross.
- Unladen weight: the Ifor Williams CT166 weighs 20kg more empty.
Specifications side by side
| Ifor Williams CT166 | Ifor Williams HBX506 | |
|---|---|---|
| Gross weight | 3500kg | 2600kg |
| Unladen weight | 885kg | 865kg |
| Payload | 2615kg | 1735kg |
| Internal bed | 4.87m x 1.90m | - |
| Internal length | - | 3.26m |
| Internal width | - | 1.67m |
Sources: Ifor Williams CT166, Ifor Williams HBX506. 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 carries 880kg more
- you want one that is rated 900kg heavier gross
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 HBX506 if...
- you want one that is 20kg 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
Common questions
What is the difference between the Ifor Williams CT166 and the Ifor Williams HBX506?
The Ifor Williams CT166 carries 880kg more and is rated 900kg heavier gross. The Ifor Williams HBX506 is 20kg lighter empty. The Ifor Williams CT166 is a a tilt-bed car and machinery transporter trailer; the Ifor Williams HBX506 is a a double horsebox trailer from Ifor Williams' HBX range.
Which is lighter, the Ifor Williams CT166 or the Ifor Williams HBX506?
The Ifor Williams HBX506. It is 20kg lighter empty than the Ifor Williams CT166.
Which carries more, the Ifor Williams CT166 or the Ifor Williams HBX506?
The Ifor Williams CT166, by 880kg.
Can I tow the Ifor Williams CT166 or the Ifor Williams HBX506 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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