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
Football (word) brother plays football in the States", it would be clear from context that American football is meant. Canadian French usage parallels English usage, with "le football" usually referring to Canadian or American football, and "le soccer" referring to association football. When there is ambiguity, "le football canadien" or "le football américain" is used. Rugby union football in Canada is almost always referred to simply as "rugby". In most of the English-speaking Caribbean, "football" and "soccer" are both used to refer to association football, but use of the word "football" is far more common. The exception is the Bahamas, where the