Single-speed bicycle on the situation, a messenger may prefer a mountain bike based single-speed, which can roll over many obstacles, or a fast and light road bike-based single-speed. In the United States market, bicycle companies such as Bianchi, Cannondale, Fuji Bike, KHS, Kona, Raleigh, Giant, Specialized, Swobo, Felt, Trek and Niner all have produced and marketed single speed bicycles. Because most full suspension frame designs either have a single pivot that is not concentric with the bottom bracket, or a linkage with a variable center of rotation, the distance between the bottom bracket and rear axle varies throughout the suspension's travel. This
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