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
French bicycle industry for the rebirth of the French industry. In 1881, Paul de Vivie, a man of twenty-eight, bought his first bicycle, an "ordinary". By 1887, de Vivie decided to devote his attention to his avocation; he sold his business, and moved to Saint-Étienne, where he opened a bicycle shop and started a magazine, "Le Cycliste". Velocio, as de Vivie was known, began to import bicycles from Coventry; within two years, however, he had begun to produce his own bicycles. His 1889 "La Gauloise" was the first bicycle produced in France. French bicycle manufacturers have included: French bicycle component manufacturers have included: