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 Trek discontinued the Exercycle line, spinning off its fitness division into an independently-owned company, renamed Vision Fitness. In 1995, Trek introduced its full suspension Y bike, a departure from traditional bike design. The Y bike sold well, and won an "Outstanding Design and Engineering Award" from "Popular Mechanics" magazine. Also in 1995, Trek made a number of business moves in order to diversify its product offering and gain market share, acquiring Klein Bicycles, a Chehalis, WA, manufacturer of premium aluminum-framed bicycles, as well as Bontrager Cycles, a Santa Cruz, CA-based manufacturer of bicycle components and hand-built steel frames. Trek also