What's the Difference Between Semi-Trailers and Full Trailers?
2 Answers
Semi-trailers and full trailers mainly differ in the following aspects: 1. A full trailer refers to an ordinary vehicle towing a full trailer compartment at the rear, connected by a hitch; a semi-trailer consists of a tractor connected to a semi-trailer compartment, supported by the fifth wheel coupling on the tractor. 2. A full trailer has front wheels, while a semi-trailer does not; a full trailer has two axles, whereas a semi-trailer has only one. 3. The towing vehicle of a full trailer does not need to bear the trailer's load, only providing power to help overcome road friction; whereas a semi-trailer requires the towing vehicle to provide a support point, bearing half of the trailer's load in addition to providing power.
I've driven heavy trucks for over a decade, and the difference between semi-trailers and full trailers is huge. The semi-trailer is pulled by the tractor unit in front, with part of the weight distributed on the towing vehicle. Driving it on the highway feels like steering a small boat—it's particularly agile when turning, but the small turning radius makes it prone to skidding. Full trailers are completely different, relying entirely on their own wheels with just a small drawbar in front. Operating one feels like pulling a cart on a country road—it bounces a lot and has a smaller cargo capacity but can haul heavy loads. I remember one delivery where the full trailer was super convenient for turning at a construction site, while the semi-trailer once lost control on icy roads. Overall, semi-trailers are better for long-distance fuel efficiency, while full trailers are more practical and safer for short hauls. As drivers, we choose based on road conditions, and don’t forget to regularly check the linking components to avoid accidents.
