Head to head
Ifor Williams GP vs Ifor Williams HB511
The Ifor Williams GP is rated 800kg heavier gross.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Ifor Williams GP is rated 800kg heavier gross.
Specifications side by side
| Ifor Williams GP | Ifor Williams HB511 | |
|---|---|---|
| Gross weight | 3500kg | 2,700kg |
| Axles | Tri-axle | - |
| Unladen weight | - | 1,000kg |
| Internal length | - | 3.52m |
| Internal width | - | 1.79m |
| Brakes | - | Braked |
Sources: Ifor Williams GP, Ifor Williams HB511. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the GP if...
- you want one that is rated 800kg heavier gross
Ifor Williams GP, carried by UK dealers and hire companies listed on GetBrent for sale. Plant trailers are the working end of groundworks: contractors and hire firms use them to move mini diggers, dumpers and rollers between sites.
Listed by
- R M Trailer Centre - Middlesbrough, North Ormesby
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
Buy or hire the HB511 if...
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
Common questions
What is the difference between the Ifor Williams GP and the Ifor Williams HB511?
The Ifor Williams GP is rated 800kg heavier gross. The Ifor Williams GP is a plant trailer range; the Ifor Williams HB511 is a two-horse trailer, twin axle, wider body.
Can I tow the Ifor Williams GP 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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