Head to head
Equi-Trek Sonic Five Seats 3,500kg vs Erde PM320
The Erde PM320 is 2,440kg lighter empty. The Equi-Trek Sonic Five Seats 3,500kg is rated 3.2 tonnes heavier gross.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Equi-Trek Sonic Five Seats 3,500kg weighs 2,440kg more empty.
- Gross weight: the Equi-Trek Sonic Five Seats 3,500kg is rated 3.2 tonnes heavier gross.
Specifications side by side
| Equi-Trek Sonic Five Seats 3,500kg | Erde PM320 | |
|---|---|---|
| Gross weight | 3500kg | 300kg |
| Unladen weight | 2500kg | 60kg |
| Payload | - | 236kg |
| Internal bed | - | 200 x 112cm |
Sources: Equi-Trek Sonic Five Seats 3,500kg, Erde PM320. 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 3.2 tonnes 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.
Listed by
- Trek-Trailers Lincolnshire - Doncaster, Belton
- Trek-Trailers Three Counties - Hereford
Buy or hire the PM320 if...
- you want one that is 2,440kg lighter empty
Near-identical to the PM310, rated for slightly heavier motorcycles up to 236kg. The two are the same trailer to look at, so the number to check before buying is the wet weight of the bike you intend to carry.
Listed by
- 1Stop Trailers Ltd - Sudbury, Little Waldingfield
- Trailer Centre - Rowley Regis
Common questions
What is the difference between the Equi-Trek Sonic Five Seats 3,500kg and the Erde PM320?
The Erde PM320 is 2,440kg lighter empty. The Equi-Trek Sonic Five Seats 3,500kg is rated 3.2 tonnes heavier gross. The Equi-Trek Sonic Five Seats 3,500kg is a 5-seat version of the Sonic motorised horsebox; the Erde PM320 is a a small unbraked single-axle trailer for carrying one motorcycle..
Which is lighter, the Equi-Trek Sonic Five Seats 3,500kg or the Erde PM320?
The Erde PM320. It is 2,440kg lighter empty than the Equi-Trek Sonic Five Seats 3,500kg.
Can I tow the Equi-Trek Sonic Five Seats 3,500kg or the Erde PM320 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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