A lowbed trailer, also known as a lowboy trailer or low loader, is a specialized type of semi-trailer designed for transporting heavy and oversized loads, particularly equipment such as construction machinery, industrial equipment, and vehicles. What sets a lowbed trailer apart is its low deck height, achieved by placing the bed of the trailer closer to the ground compared to standard trailers. This low deck height allows for the transportation of tall or oversized cargo while maintaining stability and ensuring clearance under bridges and overpasses.

Lowbed trailers typically have ramps at the rear or detachable gooseneck sections that allow heavy equipment to be loaded onto the trailer. They are commonly used in the construction, mining, and forestry industries, as well as for transporting large agricultural machinery. The versatility and heavy-duty construction of lowbed trailers make them essential for safely and efficiently moving oversized loads over long distances or difficult terrain.