Derailleur gears battery pack and to a small electric motor that drives the derailleur. Although expensive, an electronic system could save a racing cyclist time when changing gears. Derailleur gears Derailleur gears are a variable-ratio transmission system commonly used on bicycles, consisting of a chain, multiple sprockets of different sizes, and a mechanism to move the chain from one sprocket to another. Although referred to as "gears" in the bike world, these bicycle "gears" are technically "sprockets" since they drive or are driven by a chain, and are not driven by one another. Modern front and rear derailleurs typically consist of a
The Big Machine The Big Machine The Big Machine is the fourth studio album by French singer, composer and producer Émilie Simon, released on 14 September 2009, by Barclay. The album is completely in English; no French songs were included on the album. However, some songs have fragments in French. Four viral videos have been posted on her official MySpace page. The videos include the same artwork used on her official website, created by AATOAA. The first one includes the full album version of "Dreamland" which is the lead single of the album. The second one includes a 36-second instrumental sample of "Chinatown".