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
Diamant (German bicycle company) Fahrradwerke GmbH by the Trek Bicycle Corporation, which has a positive effect. The company introduces more innovations in its model lineup, like the Drive+ system, which is an electronic drive-assist on the bicycle, and rolling out the line of Pedelecs eBikes. Today, the Diamant brand is focused on popular models, for city, touring and sports riding, focused on making the riding experience pleasurable. Along with Trek's racing bicycles, the two brands form cohesion and a complete offerings, spanning all markets. The company is not connected with the Norwegian bicycle manufacturer of the same name. Diamant (German bicycle company) Diamant is