Head to head
Ifor Williams HB506 vs Ifor Williams LM166
The Ifor Williams LM166 is rated 900kg heavier gross and is 125kg lighter empty.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Ifor Williams LM166 is rated 900kg heavier gross.
- Unladen weight: the Ifor Williams HB506 weighs 125kg more empty.
Specifications side by side
| Ifor Williams HB506 | Ifor Williams LM166 | |
|---|---|---|
| Gross weight | 2,600kg | 3500kg |
| Unladen weight | 920kg | 795kg |
| Internal length | 3.16m | - |
| Internal width | 1.67m | - |
| Brakes | Braked | - |
| Payload | - | 2705kg |
| Internal bed | - | 4.77m x 1.98m |
Sources: Ifor Williams HB506, Ifor Williams LM166. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the HB506 if...
The mainstream two-horse trailer in Britain, used by private owners and small yards. Its comparatively low unladen weight for the class is the practical point: it widens the range of 4x4s and large SUVs that can legally and comfortably tow it.
Listed by
- R M Trailer Centre - Middlesbrough, North Ormesby
- Blains Trailers & Tyres - Hemel Hempstead, Great Gaddesden
- Horse Trailer Sales - Robertsbridge, Staplecross
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
Buy or hire the LM166 if...
- you want one that is rated 900kg heavier gross
- you want one that is 125kg lighter empty
Bought by contractors and hauliers who regularly carry longer loads, such as fencing materials or several pallets, and need more deck length than the LM106 or LM126 provide.
Listed by
- G-Tec Trailers - Thetford, Holme Hale
- Blains Trailers & Tyres - Hemel Hempstead, Great Gaddesden
Common questions
What is the difference between the Ifor Williams HB506 and the Ifor Williams LM166?
The Ifor Williams LM166 is rated 900kg heavier gross and is 125kg lighter empty. The Ifor Williams HB506 is a two-horse trailer, twin axle; the Ifor Williams LM166 is a a long-bed flatbed trailer.
Which is lighter, the Ifor Williams HB506 or the Ifor Williams LM166?
The Ifor Williams LM166. It is 125kg lighter empty than the Ifor Williams HB506.
Can I tow the Ifor Williams HB506 or the Ifor Williams LM166 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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