Head to head
Ifor Williams CT136 vs Ifor Williams HB510XL
The Ifor Williams CT136 is 890kg lighter empty. The Ifor Williams HB510XL is rated 2.1 tonnes heavier gross.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Ifor Williams HB510XL weighs 890kg more empty.
- Gross weight: the Ifor Williams HB510XL is rated 2.1 tonnes heavier gross.
Specifications side by side
| Ifor Williams CT136 | Ifor Williams HB510XL | |
|---|---|---|
| Gross weight | 1,400kg single axle / 2,000kg twin axle / 2,600kg CT136HD | 3500kg |
| Unladen weight | 400kg single axle / 495kg twin axle | 1290kg |
| Bed | 4.00m x 1.84m | - |
| Payload | - | 2210kg |
| Internal length | - | 4.25m |
| Internal width | - | 1.74m |
Sources: Ifor Williams CT136, Ifor Williams HB510XL. 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 890kg 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 HB510XL if...
- you want one that is rated 2.1 tonnes heavier gross
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 CT136 and the Ifor Williams HB510XL?
The Ifor Williams CT136 is 890kg lighter empty. The Ifor Williams HB510XL is rated 2.1 tonnes heavier gross. The Ifor Williams CT136 is a flatbed car transporter, single or twin axle; the Ifor Williams HB510XL is a an extra-length double horsebox trailer.
Which is lighter, the Ifor Williams CT136 or the Ifor Williams HB510XL?
The Ifor Williams CT136. It is 890kg lighter empty than the Ifor Williams HB510XL.
Can I tow the Ifor Williams CT136 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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