Head to head
Ifor Williams HB403 vs Stewart GX16-21 L
The Ifor Williams HB403 is 4,733kg lighter empty.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Stewart GX16-21 L weighs 4,733kg more empty.
Specifications side by side
| Ifor Williams HB403 | Stewart GX16-21 L | |
|---|---|---|
| Unladen weight | 767kg | 5,500kg |
| Gross weight | 1600kg | - |
| Payload | 833kg | - |
| Internal length | 3.08m | - |
| Internal width | 1.30m | - |
| Carrying capacity | - | 16,000kg |
| Cubic capacity | - | grain 21m3, silage 37m3 |
| Body | - | 6700 x 2450 x 1370mm |
Sources: Ifor Williams HB403, Stewart GX16-21 L. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the HB403 if...
- you want one that is 4,733kg lighter empty
The smallest trailer in the HB horsebox range, bought by owners of a single horse or a couple of ponies who want the lightest legal option that can still be towed by a mid-size car.
Listed by
- Horse Trailer Sales - Robertsbridge, Staplecross
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
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 HB403 and the Stewart GX16-21 L?
The Ifor Williams HB403 is 4,733kg lighter empty. The Ifor Williams HB403 is a a compact single-horse or two-pony horsebox trailer; the Stewart GX16-21 L is a bulk agricultural trailer with easy sheet cover.
Which is lighter, the Ifor Williams HB403 or the Stewart GX16-21 L?
The Ifor Williams HB403. It is 4,733kg lighter empty than the Stewart GX16-21 L.
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