Head to head
Ifor Williams HB511 vs Lider 39920
The Ifor Williams HB511 is rated 1,950kg heavier gross and is 1.22m (4ft) longer inside. The Lider 39920 is 630kg lighter empty.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Ifor Williams HB511 is rated 1,950kg heavier gross.
- Unladen weight: the Ifor Williams HB511 weighs 630kg more empty.
- Internal length: the Ifor Williams HB511 is 1.22m (4ft) longer inside.
- Internal width: the Ifor Williams HB511 is 44cm (1.5ft) wider inside.
Specifications side by side
| Ifor Williams HB511 | Lider 39920 | |
|---|---|---|
| Gross weight | 2,700kg | 750kg |
| Unladen weight | 1,000kg | 370kg |
| Internal length | 3.52m | 230cm |
| Internal width | 1.79m | 135cm |
| Brakes | Braked | Unbraked |
| Internal height | - | 157cm |
| Axles | - | 1 |
Sources: Ifor Williams HB511, Lider 39920. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the HB511 if...
- you want one that is rated 1,950kg heavier gross
- you want one that is 1.22m (4ft) longer inside
- you want one that is 44cm (1.5ft) wider inside
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
Buy or hire the 39920 if...
- you want one that is 630kg lighter empty
The smallest box van in the range, for buyers who want lockable, weatherproof storage on the move without moving up to a braked twin-axle trailer.
Listed by
- Lider Trailers - Accrington, Blackburn
Common questions
What is the difference between the Ifor Williams HB511 and the Lider 39920?
The Ifor Williams HB511 is rated 1,950kg heavier gross and is 1.22m (4ft) longer inside. The Lider 39920 is 630kg lighter empty. The Ifor Williams HB511 is a two-horse trailer, twin axle, wider body; the Lider 39920 is a an unbraked single-axle enclosed box van trailer rated at 750kg gross weight..
Which is lighter, the Ifor Williams HB511 or the Lider 39920?
The Lider 39920. It is 630kg lighter empty than the Ifor Williams HB511.
Can I tow the Ifor Williams HB511 or the Lider 39920 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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