Bogie

A bogie ( /ˈboʊɡi/ BOH-ghee) is a wheeled wagon or trolley. In mechanics terms, a bogie is a chassis or framework carrying wheels, attached to a vehicle. It can be fixed in place, as on a cargo truck, mounted on a swivel, as on a railway carriage/car or locomotive, or sprung as in the suspension of a caterpillar tracked vehicle, or as an assembly in the landing gear of an aircraft.