Derailleur gears several standards in use, and in each the product of the derailleur's actuation ratio and the length of cable pulled must equal the pitch of the rear sprockets. The following standards exist. Some rear derailleurs, especially for mountain bikes, incorporate a clutch to keep the lower length of chain in sufficient tension to prevent the chain from striking the bottom of the chain stay, called "chain slap", and which can damage the chain stay. Clutches are also helpful in preventing the chain from derailing from the chain ring on systems without a front derailleur. The front derailleur only has to
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