Head to head
Equi-Trek Sonic Five Seats 3,500kg vs Lider 39920
The Lider 39920 is 2,130kg lighter empty. The Equi-Trek Sonic Five Seats 3,500kg is rated 2,750kg heavier gross.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Equi-Trek Sonic Five Seats 3,500kg weighs 2,130kg more empty.
- Gross weight: the Equi-Trek Sonic Five Seats 3,500kg is rated 2,750kg heavier gross.
Specifications side by side
| Equi-Trek Sonic Five Seats 3,500kg | Lider 39920 | |
|---|---|---|
| Gross weight | 3500kg | 750kg |
| Unladen weight | 2500kg | 370kg |
| Internal length | - | 230cm |
| Internal width | - | 135cm |
| Internal height | - | 157cm |
| Axles | - | 1 |
| Brakes | - | Unbraked |
Sources: Equi-Trek Sonic Five Seats 3,500kg, Lider 39920. 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 rated 2,750kg heavier gross
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.
Full Sonic Five Seats 3,500kg specifications →Buy or hire the 39920 if...
- you want one that is 2,130kg lighter empty
The smallest box van in the range, for buyers who want lockable, weatherproof storage on the move without moving up to a braked twin-axle trailer.
Full 39920 specifications →Common questions
What is the difference between the Equi-Trek Sonic Five Seats 3,500kg and the Lider 39920?
The Lider 39920 is 2,130kg lighter empty. The Equi-Trek Sonic Five Seats 3,500kg is rated 2,750kg heavier gross. The Equi-Trek Sonic Five Seats 3,500kg is a 5-seat version of the Sonic motorised horsebox; the Lider 39920 is a an unbraked single-axle enclosed box van trailer rated at 750kg gross weight..
Which is lighter, the Equi-Trek Sonic Five Seats 3,500kg or the Lider 39920?
The Lider 39920. It is 2,130kg lighter empty than the Equi-Trek Sonic Five Seats 3,500kg.
Can I tow the Equi-Trek Sonic Five Seats 3,500kg or the Lider 39920 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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