Head to head
Ifor Williams CT136 vs Ifor Williams HB511
The Ifor Williams CT136 is 600kg lighter empty. The Ifor Williams HB511 is rated 1.3 tonnes heavier gross.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Ifor Williams HB511 weighs 600kg more empty.
- Gross weight: the Ifor Williams HB511 is rated 1.3 tonnes heavier gross.
Specifications side by side
| Ifor Williams CT136 | Ifor Williams HB511 | |
|---|---|---|
| Gross weight | 1,400kg single axle / 2,000kg twin axle / 2,600kg CT136HD | 2,700kg |
| Unladen weight | 400kg single axle / 495kg twin axle | 1,000kg |
| Bed | 4.00m x 1.84m | - |
| Internal length | - | 3.52m |
| Internal width | - | 1.79m |
| Brakes | - | Braked |
Sources: Ifor Williams CT136, Ifor Williams HB511. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the CT136 if...
- you want one that is 600kg lighter empty
The accessible end of car transport, for towing a road car, a track-day car or a small classic. Motorsport and classic-car owners tend toward the twin-axle and HD versions for the higher gross weight and the tie-down provision.
Full CT136 specifications →Buy or hire the HB511 if...
- you want one that is rated 1.3 tonnes heavier gross
The wider step up from the HB506, for larger horses or owners who want more room in transit. The extra 12cm of internal width and 36cm of length cost 80kg unladen, which is worth checking against your tow vehicle before choosing it over the HB506.
Listed by
- Trek-Trailers Lincolnshire - Doncaster, Belton
- Trek-Trailers Suffolk - Bury Saint Edmunds
- R M Trailer Centre - Middlesbrough, North Ormesby
- Blains Trailers & Tyres - Hemel Hempstead, Great Gaddesden
- Horse Trailer Sales - Robertsbridge, Staplecross
- Trek-Trailers Three Counties - Hereford
Common questions
What is the difference between the Ifor Williams CT136 and the Ifor Williams HB511?
The Ifor Williams CT136 is 600kg lighter empty. The Ifor Williams HB511 is rated 1.3 tonnes heavier gross. The Ifor Williams CT136 is a flatbed car transporter, single or twin axle; the Ifor Williams HB511 is a two-horse trailer, twin axle, wider body.
Which is lighter, the Ifor Williams CT136 or the Ifor Williams HB511?
The Ifor Williams CT136. It is 600kg lighter empty than the Ifor Williams HB511.
Can I tow the Ifor Williams CT136 or the Ifor Williams HB511 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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