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
Star Trek VI: The Undiscovered Country Star Trek VI: The Undiscovered Country Star Trek VI: The Undiscovered Country is a 1991 American science fiction film released by Paramount Pictures. It is the sixth feature film based on "Star Trek", and a sequel to the 1966–1969 "" television series. Taking place after the events of "", it is the last film featuring the entire cast of . After the destruction of the Klingon moon Praxis leads the Klingon Empire to pursue peace with their long-time adversary the Federation, the crew of the USS "Enterprise" must race against unseen conspirators with a militaristic agenda. The sixth film in