Description
A tractor unit , also known as a truck unit , lorry unit , power unit , prime mover , ten-wheeler , semi-tractor , semi-truck , semi-lorry , tractor cab , truck cab , lorry cab , big rig tractor , big rig truck or big rig lorry or simply a tractor , truck , lorry , semi , big rig or rig , is a characteristically heavy-duty towing engine that provides motive power for hauling a towed or trailered load. These fall into two categories: heavy- and medium-duty military and commercial rear-wheel-drive semi-tractors used for hauling semi-trailers, and very heavy-duty typically off-road-capable, often 6×6, military and commercial tractor units, including ballast tractors.
It should not be confused with a tractor-trailer which is a combination of a tractor unit and semi-trailer, whereas a tractor unit describes only the tractor portion.
Tractor Unit News
Tags
Collections
No collections available for this topic.
