Head to head
Ifor Williams HBX506 vs Stewart GX16-21 L
The Ifor Williams HBX506 is 4,635kg lighter empty.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Stewart GX16-21 L weighs 4,635kg more empty.
Specifications side by side
| Ifor Williams HBX506 | Stewart GX16-21 L | |
|---|---|---|
| Unladen weight | 865kg | 5,500kg |
| Gross weight | 2600kg | - |
| Payload | 1735kg | - |
| Internal length | 3.26m | - |
| Internal width | 1.67m | - |
| Carrying capacity | - | 16,000kg |
| Cubic capacity | - | grain 21m3, silage 37m3 |
| Body | - | 6700 x 2450 x 1370mm |
Sources: Ifor Williams HBX506, Stewart GX16-21 L. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the HBX506 if...
- you want one that is 4,635kg lighter empty
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
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
- East Midlands Trailers - Leicester, Thrussington
- R M Trailer Centre - Middlesbrough, North Ormesby
Buy or hire the GX16-21 L if...
A large bulk trailer used to cart grain and root crops at harvest, with an easy sheet system to cover the load without climbing on top. Farmers hire extra units like this at harvest to move crop faster than their own trailers allow.
Listed by
- Rising Sun Trailer Hire - York
Common questions
What is the difference between the Ifor Williams HBX506 and the Stewart GX16-21 L?
The Ifor Williams HBX506 is 4,635kg lighter empty. The Ifor Williams HBX506 is a a double horsebox trailer from Ifor Williams' HBX range; the Stewart GX16-21 L is a bulk agricultural trailer with easy sheet cover.
Which is lighter, the Ifor Williams HBX506 or the Stewart GX16-21 L?
The Ifor Williams HBX506. It is 4,635kg lighter empty than the Stewart GX16-21 L.
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