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
Influence of French on English Several elements must be observed. The following French glossary in English is in no way exhaustive. These words come as examples to illustrate the countless French words that are part of the English language. In this section, examples of French-to-English lexical contributions are classified by field and in chronological order. The periods during which these words were used in the English language are specified as much as possible. It is not always possible to state with certainty the precise period from which a word was borrowed or integrated. The English word is on the left, with its current French equivalent