Belt-driven bicycle with a compact design that, like STRiDA, featured a belt drive. Other folding-bike manufacturers that have implemented a belt drive include U.S. company Bike Friday and Netherlands-based Bernds. In 2007, Gates Corporation developed a high-modulus synchronous belt and sprocket system called the Carbon Drive System. The belt’s pitch allowed for lower tension requirements to help prevent skipping. Lightweight, patent-pending sprockets have mud ports, openings under each tooth, which work to slough off debris. In 2009, an increasing number of bicycle companies, including Trek and "f"8 Cycles, offered belt-driven bicycles. While builders initially focused on single-speeds and internal hubs, in early
Trek Bicycle Corporation American team riding an American made bicycle. Armstrong went on to win a record-setting seven-consecutive Tours de France, all of them aboard Trek bicycles. He did at some points ride a Litespeed bike, painted and badged as a Trek. In 2012, all of Armstrong's Tour victories were rescinded after Armstrong was found to have violated anti-doping regulations. In 1998, Trek established its Advanced Concepts Group (ACG), a collection of engineers and technicians dedicated to technologies development. The leading edge of Trek's design and engineering efforts, ACG is perhaps best known for a number of products introduced and used by Lance