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
Specialized Bicycle Components (nickname for Portland), alleging it resembled the Specialized model name Stumpjumper. Mountain Cycle closed doors shortly thereafter. In 2009 Specialized had a trademark dispute with a manufacturer of bicycle bags, Epic Designs, now Revelate Designs. In 2010 Specialized took NASCAR racing driver & team owner Robby Gordon to court over the logo used for his own "Speed energy drink", claiming it was visually similar to their own 'S' logo. Gordon sued Specialized after receiving a cease-and-desist letter in September 2010 and Specialized then counter-sued Gordon. Gordon was ordered by the court to remove the Speed 'S' logo from his racecars