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
Quality Bicycle Products Quality Bicycle Products Quality Bicycle Products is the largest distributor of bicycle parts and accessories in the bicycle industry, with revenues of $150 million in 2008. In addition to wholesaling bicycles and components from other manufacturers, QBP owns and manufactures several brands of its own. QBP also participates in activities which support its community through cycling advocacy and green building. Founded by Steve Flagg and Mary Henrickson in 1981, QBP operated from a small office in St. Paul, MN. The company did $100,000 of sales during its first year. In the second year sales reached $250,000 and in 1983 the