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 2005, a bootleg copy of the soundtrack also surfaced with thirty-six tracks of score and a running time of nearly seventy minutes. Intrada Records released a two-disc set in 2012. The first disc is made up of the complete score and four extra cues. The second disc contains the material from the original MCA release. "The Undiscovered Country"s Cold War allegory and references to literary history were recognized among researchers and cultural historians. According to scholar Larry Kreitzer, "The Undiscovered Country" has more references to William Shakespeare than any other "Star Trek" work until at least 1996. The title itself