Derailleur gears operates the lever while pedalling, the change in cable tension moves the chain-guide from side to side, "derailing" the chain onto different sprockets. For more information about the choice of particular gear ratios and sprocket sizes, see Bicycle gearing. "Derailleur" is a French word, spelled "dérailleur" in French, derived from the derailment of a train from its tracks. Its first recorded use was 1930. At least one notable bicycle industry author has attempted to promote the anglicized spelling of "derailer". As of 2013, however, neither Merriam-Webster nor the Oxford English Dictionary has an entry for "derailer". Various derailleur systems were
Quebec French lexicon same meaning as the English word. In France, they often have a very different meaning; for example 'le smoking' for 'tuxedo'. Borrowing from English is politically sensitive in Quebec and tends to be socially discouraged. Formal Quebec French also has a very different approach to gender-neutral language than Metropolitan French. There is a much greater tendency to generalize feminine markers among nouns referring to professions. This is done in order to avoid having to refer to a woman with a masculine noun, and thereby seeming to suggest that a particular profession is primarily masculine. Forms that would be seen as