NSU Motorenwerke possible that in 1955, NSU became the biggest motorcycle producer in the world. NSU also holds four world records for speed: 1951, 1953, 1954, and 1955. In August 1956, Wilhelm Herz at the Bonneville Salt Flats, Utah, became the first man to ride a motorcycle faster than . In 1957, NSU re-entered the car market with the new Prinz (Prince), a small car with a doubled NSU Max engine, an air-cooled two-cylinder engine of and . Motorbike production continued until 1968. NSU's last production motorcycle was the Quick 50. In 1964, NSU offered the world's first Wankel engined car: the
Triumph Engineering for their latest motorbike. By the mid-1920s Triumph had become one of Britain's main motorcycle and car makers, with a plant capable of producing as many as 30,000 motorcycles and cars each year. Triumph also found its bicycles demanded overseas, and export sales became a primary source of the company's revenues, although for the United States, Triumph models were manufactured by licence. The company's first automotive success was the Super Seven model, which debuted in 1928. Soon after, the Super Eight model was developed. When the Great Depression began in 1929, Triumph sold its German subsidiary as a separate, independently