Head to head
Equi-Trek Sonic 3,500kg vs Stewart GX16-21 L
The Equi-Trek Sonic 3,500kg is 3,180kg lighter empty.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Stewart GX16-21 L weighs 3,180kg more empty.
Specifications side by side
| Equi-Trek Sonic 3,500kg | Stewart GX16-21 L | |
|---|---|---|
| Unladen weight | 2320kg | 5,500kg |
| Gross weight | 3500kg | - |
| Carrying capacity | - | 16,000kg |
| Cubic capacity | - | grain 21m3, silage 37m3 |
| Body | - | 6700 x 2450 x 1370mm |
Sources: Equi-Trek Sonic 3,500kg, Stewart GX16-21 L. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Sonic 3,500kg if...
- you want one that is 3,180kg lighter empty
A compact motorised horsebox pitched as easy to drive day to day, for owners of one or two horses who want a small horsebox rather than a trailer and tow car. It is one of Equi-Trek's lower-cost motorised models.
Listed by
- Trek-Trailers Lincolnshire - Doncaster, Belton
- Trek-Trailers Suffolk - Bury Saint Edmunds
- Trek-Trailers Three Counties - Hereford
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 Equi-Trek Sonic 3,500kg and the Stewart GX16-21 L?
The Equi-Trek Sonic 3,500kg is 3,180kg lighter empty. The Equi-Trek Sonic 3,500kg is a compact 3.5 tonne motorised 2-horse horsebox; the Stewart GX16-21 L is a bulk agricultural trailer with easy sheet cover.
Which is lighter, the Equi-Trek Sonic 3,500kg or the Stewart GX16-21 L?
The Equi-Trek Sonic 3,500kg. It is 3,180kg lighter empty than the Stewart GX16-21 L.
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