. . "The tzero is a handmade electric sports car designed and built in very limited numbers by the U.S. company AC Propulsion. The tzero was based on the Piontek Sportech kit car, which consists of a fiberglass body built over a reinforced steel space frame with double wishbone independent suspension and rack and pinion steering. AC Propulsion added the AC-150 drivetrain, a single-speed electric system with an overall gear ratio of 9:1."@en .