Head to head
Ifor Williams General Duty vs Ifor Williams HB511
The Ifor Williams HB511 is rated 1.3 tonnes heavier gross and is 1.68m (5.5ft) longer inside.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Ifor Williams HB511 is rated 1.3 tonnes heavier gross.
- Internal length: the Ifor Williams HB511 is 1.68m (5.5ft) longer inside.
- Internal width: the Ifor Williams HB511 is 56cm (2ft) wider inside.
Specifications side by side
| Ifor Williams General Duty | Ifor Williams HB511 | |
|---|---|---|
| Gross weight | 1400kg to 2700kg depending on model | 2,700kg |
| Internal length | 1.84m (6ft) to 3.71m (12ft 2in) | 3.52m |
| Internal width | 1.23m (4ft) to 1.71m (5ft 6in) | 1.79m |
| Axles | Single or twin axle | - |
| Unladen weight | - | 1,000kg |
| Brakes | - | Braked |
Sources: Ifor Williams General Duty, Ifor Williams HB511. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the General Duty if...
Ifor Williams's entry-level flatbed range, bought by householders, gardeners and small trades for tip runs, garden waste and general loads. It is the trailer most UK hire yards keep several of, since one size or another suits almost any small job.
Listed by
- John Page Trailers Ltd - Ashford, Biddenden
Buy or hire the HB511 if...
- you want one that is rated 1.3 tonnes heavier gross
- you want one that is 1.68m (5.5ft) longer inside
- you want one that is 56cm (2ft) 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 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
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
Common questions
What is the difference between the Ifor Williams General Duty and the Ifor Williams HB511?
The Ifor Williams HB511 is rated 1.3 tonnes heavier gross and is 1.68m (5.5ft) longer inside. The Ifor Williams General Duty is a small flatbed/general purpose trailer range; the Ifor Williams HB511 is a two-horse trailer, twin axle, wider body.
Can I tow the Ifor Williams General Duty 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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