Head to head
Equi-Trek Sonic 3,500kg vs Ifor Williams CT177
The Ifor Williams CT177 is 1,515kg lighter empty.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Equi-Trek Sonic 3,500kg weighs 1,515kg more empty.
Specifications side by side
| Equi-Trek Sonic 3,500kg | Ifor Williams CT177 | |
|---|---|---|
| Gross weight | 3500kg | 3500kg |
| Unladen weight | 2320kg | 805kg |
| Overall length | - | 6.70m / 22'0" |
| Bed | - | 5.00m / 16'4" ((internal) length); 1.91m / 6'3" ((internal) width) |
| Payload | - | approx. 2695kg |
Sources: Equi-Trek Sonic 3,500kg, Ifor Williams CT177. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Sonic 3,500kg if...
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 CT177 if...
- you want one that is 1,515kg lighter empty
The CT177 is built to be wide enough for most light commercial vehicles while remaining narrow enough for smaller cars, making it a common choice for vehicle recovery firms and the motor trade. Its long bed and 3500kg GVW keep it within standard car-licence towing limits for a single vehicle plus ramps.
Listed by
- Blains Trailers & Tyres - Hemel Hempstead, Great Gaddesden
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
Common questions
What is the difference between the Equi-Trek Sonic 3,500kg and the Ifor Williams CT177?
The Ifor Williams CT177 is 1,515kg lighter empty. The Equi-Trek Sonic 3,500kg is a compact 3.5 tonne motorised 2-horse horsebox; the Ifor Williams CT177 is a a twin-axle car transporter trailer with a long, narrow bed for single-vehicle recovery and trade use..
Which is lighter, the Equi-Trek Sonic 3,500kg or the Ifor Williams CT177?
The Ifor Williams CT177. It is 1,515kg lighter empty than the Equi-Trek Sonic 3,500kg.
Can I tow the Equi-Trek Sonic 3,500kg or the Ifor Williams CT177 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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