Head to head
Bockmann Grand Master SR vs Ifor Williams HB511
The Bockmann Grand Master SR is 38cm (1ft) longer inside. The Ifor Williams HB511 is 4cm wider inside.
Last reviewed 13 September 2026
Key differences
- Internal length: the Bockmann Grand Master SR is 38cm (1ft) longer inside.
- Internal width: the Ifor Williams HB511 is 4cm wider inside.
Specifications side by side
| Bockmann Grand Master SR | Ifor Williams HB511 | |
|---|---|---|
| Gross weight | 2700kg | 2,700kg |
| Internal length | 3900mm | 3.52m |
| Internal width | 1750mm | 1.79m |
| Payload | 1462kg | - |
| Internal height | 2300mm | - |
| Unladen weight | - | 1,000kg |
| Brakes | - | Braked |
Sources: Bockmann Grand Master SR, Ifor Williams HB511. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Grand Master SR if...
- you want one that is 38cm (1ft) longer inside
The top trim of the Master line, with a walk-in tack room and centre-post partition for owners who want more storage and easier loading than the basic Master. Suits liveries and competition riders travelling one or two larger horses.
Listed by
- Böckmann UK Trailers & Horseboxes - Cinderford, Littledean
Buy or hire the HB511 if...
- you want one that is 4cm 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
Common questions
What is the difference between the Bockmann Grand Master SR and the Ifor Williams HB511?
The Bockmann Grand Master SR is 38cm (1ft) longer inside. The Ifor Williams HB511 is 4cm wider inside. The Bockmann Grand Master SR is a larger polyester 2-horse trailer with walk-in tack room; the Ifor Williams HB511 is a two-horse trailer, twin axle, wider body.
Can I tow the Bockmann Grand Master SR 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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