Head to head
Bockmann Grand Master SR vs Ifor Williams HB510XL
The Ifor Williams HB510XL carries 748kg more and is rated 800kg heavier gross. The Bockmann Grand Master SR is 1cm wider inside.
Last reviewed 13 September 2026
Key differences
- Payload: the Ifor Williams HB510XL carries 748kg more.
- Gross weight: the Ifor Williams HB510XL is rated 800kg heavier gross.
- Internal length: the Ifor Williams HB510XL is 35cm (1ft) longer inside.
- Internal width: the Bockmann Grand Master SR is 1cm wider inside.
Specifications side by side
| Bockmann Grand Master SR | Ifor Williams HB510XL | |
|---|---|---|
| Gross weight | 2700kg | 3500kg |
| Payload | 1462kg | 2210kg |
| Internal length | 3900mm | 4.25m |
| Internal width | 1750mm | 1.74m |
| Internal height | 2300mm | - |
| Unladen weight | - | 1290kg |
Sources: Bockmann Grand Master SR, Ifor Williams HB510XL. 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 1cm wider 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 HB510XL if...
- you want one that carries 748kg more
- you want one that is rated 800kg heavier gross
- you want one that is 35cm (1ft) longer inside
For owners of taller or longer horses who find the standard HB511 too tight, giving extra internal length on the same 3500kg chassis so it stays towable by a suitably rated 4x4.
Listed by
- Horse Trailer Sales - Robertsbridge, Staplecross
Common questions
What is the difference between the Bockmann Grand Master SR and the Ifor Williams HB510XL?
The Ifor Williams HB510XL carries 748kg more and is rated 800kg heavier gross. The Bockmann Grand Master SR is 1cm wider inside. The Bockmann Grand Master SR is a larger polyester 2-horse trailer with walk-in tack room; the Ifor Williams HB510XL is a an extra-length double horsebox trailer.
Which carries more, the Bockmann Grand Master SR or the Ifor Williams HB510XL?
The Ifor Williams HB510XL, by 748kg.
Can I tow the Bockmann Grand Master SR or the Ifor Williams HB510XL 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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