Rolling chassis

A rolling chassis is the fully-assembled chassis of a motor vehicle (car, truck, bus, or other vehicle) without its bodywork. It is equipped with running gear (engine and drivetrain) and ready for delivery to a coachbuilder to be completed. Historically, bespoke luxury automobiles were finished inside and out to an owner's specifications by a coachbuilder, and specialty vehicles (such as fire engines) were outfitted by firms devoted to that task.