Exoskeleton car
Exoskeleton car (also known as an exoskeletal car) is a type of automobile whose structural frame is exposed. They are typically made of steel, aluminum or carbon fiber tubes. The body styles are open-wheel sports cars, with wheels mounted outside of the main body, each covered by its own lightweight mudguard, usually carried as unsprung weight supported on the hub carrier. The chassis generally consists of four longitudinal tubes, two on each side, inboard of the wheels. These main chassis tubes are reinforced by smaller diagonal or vertical tubes.