Head to head
Equi-Trek Sonic Five Seats 3,500kg vs Humbaur HTK
The Equi-Trek Sonic Five Seats 3,500kg is a 5-seat version of the sonic motorised horsebox. The Humbaur HTK is a a tandem-axle three-way tipping trailer for construction and agricultural use.
Last reviewed 13 September 2026
Specifications side by side
| Equi-Trek Sonic Five Seats 3,500kg | Humbaur HTK | |
|---|---|---|
| Gross weight | 3500kg | 3500kg |
| Unladen weight | 2500kg | - |
| Payload | - | 2550kg |
| Internal bed | - | 3.14m x 1.75m |
| Axles | - | Twin |
| Brakes | - | Braked |
Sources: Equi-Trek Sonic Five Seats 3,500kg, Humbaur HTK. 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...
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 HTK if...
A heavy-duty three-way tipper for builders' merchants and groundworkers who need to tip to either side as well as the rear. The wide model line (2000kg to 3500kg gross) lets buyers pick a size without moving to a different range.
Listed by
- Trek-Trailers Lincolnshire - Doncaster, Belton
- Trek-Trailers Suffolk - Bury Saint Edmunds
- Trek-Trailers Three Counties - Hereford
Common questions
What is the difference between the Equi-Trek Sonic Five Seats 3,500kg and the Humbaur HTK?
The Equi-Trek Sonic Five Seats 3,500kg is a 5-seat version of the Sonic motorised horsebox; the Humbaur HTK is a a tandem-axle three-way tipping trailer for construction and agricultural use.
Can I tow the Equi-Trek Sonic Five Seats 3,500kg or the Humbaur HTK 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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