Head to head
Ifor Williams HBX506 vs Ifor Williams LM166
The Ifor Williams LM166 carries 970kg more and is rated 900kg heavier gross.
Last reviewed 13 September 2026
Key differences
- Payload: the Ifor Williams LM166 carries 970kg more.
- Gross weight: the Ifor Williams LM166 is rated 900kg heavier gross.
- Unladen weight: the Ifor Williams HBX506 weighs 70kg more empty.
Specifications side by side
| Ifor Williams HBX506 | Ifor Williams LM166 | |
|---|---|---|
| Gross weight | 2600kg | 3500kg |
| Unladen weight | 865kg | 795kg |
| Payload | 1735kg | 2705kg |
| Internal length | 3.26m | - |
| Internal width | 1.67m | - |
| Internal bed | - | 4.77m x 1.98m |
Sources: Ifor Williams HBX506, Ifor Williams LM166. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the HBX506 if...
A mid-size horsebox for owners moving one or two horses who want the updated HBX styling and features rather than the standard HB range trailer.
Listed by
- R M Trailer Centre - Middlesbrough, North Ormesby
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
Buy or hire the LM166 if...
- you want one that carries 970kg more
- you want one that is rated 900kg heavier gross
- you want one that is 70kg 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 HBX506 and the Ifor Williams LM166?
The Ifor Williams LM166 carries 970kg more and is rated 900kg heavier gross. The Ifor Williams HBX506 is a a double horsebox trailer from Ifor Williams' HBX range; the Ifor Williams LM166 is a a long-bed flatbed trailer.
Which is lighter, the Ifor Williams HBX506 or the Ifor Williams LM166?
The Ifor Williams LM166. It is 70kg lighter empty than the Ifor Williams HBX506.
Which carries more, the Ifor Williams HBX506 or the Ifor Williams LM166?
The Ifor Williams LM166, by 970kg.
Can I tow the Ifor Williams HBX506 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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