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 alludes to "Hamlet", Act III, Scene 1. Meyer had originally intended "The Wrath of Khan" to be called "The Undiscovered Country". Whereas the undiscovered country referred to in "Hamlet" (and its intended meaning in "The Wrath of Khan") is death, "Star Trek VI"s use of the phrase refers to a future where Klingons and humans coexist in peace. A phrase from "The Tempest" is mentioned by Gorkon as representing the new galactic order, that of a "brave new world". Chang recites most of the lines from Shakespeare used in the film, including quotes from "Romeo and Juliet" and "Henry IV,