A semi-trailer truck [1] (also known by a wide variety of other terms – see below) is the combination of a tractor unit and one or more semi-trailers to carry freight. A semi-trailer attaches to the tractor with a type of hitch called a fifth wheel.

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May 14, 2024 · The different types of semi trucks — also known as tractor-trailers — include: Day cabs; Sleeper trucks; Custom haulers; 18-wheeler trucks; Sloped-nose trucks; Conventional-nosed trucks; Trucks with raised and flat roofs; Other types of trucks exist — like dump trucks and tanker trucks — but these trucks fall under the above-mentioned ...

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Semi Tractors cover many heavy duty trucks, including Day Cabs, Sleeper Cabs and Class 8 Cab Chassis. Semi Tractors are most often used for hauling cargo. The sleeper models have a compartment attached to the cab, allowing drivers to rest while on long trips.

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