Head to head
Equi-Trek Sonic Five Seats 3,500kg vs Stewart GX16-21 L
The Equi-Trek Sonic Five Seats 3,500kg is 3 tonnes lighter empty.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Stewart GX16-21 L weighs 3 tonnes more empty.
Specifications side by side
| Equi-Trek Sonic Five Seats 3,500kg | Stewart GX16-21 L | |
|---|---|---|
| Unladen weight | 2500kg | 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 Five Seats 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 Five Seats 3,500kg if...
- you want one that is 3 tonnes lighter empty
A five-seat cab variant of the Sonic, aimed at families or small teams who want to travel together to competitions rather than sending a second car. It carries the same horse capacity as the standard Sonic.
Listed by
- Trek-Trailers Lincolnshire - Doncaster, Belton
- 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 Five Seats 3,500kg and the Stewart GX16-21 L?
The Equi-Trek Sonic Five Seats 3,500kg is 3 tonnes lighter empty. The Equi-Trek Sonic Five Seats 3,500kg is a 5-seat version of the Sonic motorised horsebox; the Stewart GX16-21 L is a bulk agricultural trailer with easy sheet cover.
Which is lighter, the Equi-Trek Sonic Five Seats 3,500kg or the Stewart GX16-21 L?
The Equi-Trek Sonic Five Seats 3,500kg. It is 3 tonnes lighter empty than the Stewart GX16-21 L.
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