Head to head
Ifor Williams CT166 vs Ifor Williams HB510XL
The Ifor Williams CT166 is 405kg lighter empty and carries 405kg more.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Ifor Williams HB510XL weighs 405kg more empty.
- Payload: the Ifor Williams CT166 carries 405kg more.
Specifications side by side
| Ifor Williams CT166 | Ifor Williams HB510XL | |
|---|---|---|
| Gross weight | 3500kg | 3500kg |
| Unladen weight | 885kg | 1290kg |
| Payload | 2615kg | 2210kg |
| Internal bed | 4.87m x 1.90m | - |
| Internal length | - | 4.25m |
| Internal width | - | 1.74m |
Sources: Ifor Williams CT166, Ifor Williams HB510XL. 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 405kg lighter empty
- you want one that carries 405kg more
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 HB510XL if...
For owners of taller or longer horses who find the standard HB511 too tight, giving extra internal length on the same 3500kg chassis so it stays towable by a suitably rated 4x4.
Listed by
- Horse Trailer Sales - Robertsbridge, Staplecross
Common questions
What is the difference between the Ifor Williams CT166 and the Ifor Williams HB510XL?
The Ifor Williams CT166 is 405kg lighter empty and carries 405kg more. The Ifor Williams CT166 is a a tilt-bed car and machinery transporter trailer; the Ifor Williams HB510XL is a an extra-length double horsebox trailer.
Which is lighter, the Ifor Williams CT166 or the Ifor Williams HB510XL?
The Ifor Williams CT166. It is 405kg lighter empty than the Ifor Williams HB510XL.
Which carries more, the Ifor Williams CT166 or the Ifor Williams HB510XL?
The Ifor Williams CT166, by 405kg.
Can I tow the Ifor Williams CT166 or the Ifor Williams HB510XL 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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