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 1993 Trek also acquired Gary Fisher Mountain Bikes, named after Gary Fisher, one of the inventors of the mountain bike and one of the most popular names in off-road cycling. Fisher had founded Gary Fisher Mountain Bikes in 1983 and sold his company in 1991 to Taiwan's Anlen company, remaining on as President. In 1992, Howie Cohen, who had previously imported Nishiki, Azuki and Kuwahara bicycles, assisted Gary Fisher with his brand — 18 months later brokering the acquisition of Fisher by Trek (in 1993). In 1994 Trek entered the growing home fitness arena, introducing Trek Fitness Exercycles. In 1996