Derailleur gears by 13 drive-train. Most road bicycles have two chainrings, and touring bicycles commonly have three. The rear derailleur serves double duty: moving the chain between rear sprockets and taking up chain slack caused by moving to a smaller sprocket at the rear or a smaller chainring by the front derailleur. In order to accomplish this second task, it is positioned in the path of the bottom, slack portion of chain. Sometimes the rear-derailleurs are re-purposed as chain tensioners for single-speed bicycles that cannot adjust chain tension by a different method. Although variations exist, as noted below, most rear derailleurs have
Quebec French lexicon examples of long-standing Anglicisms include: It is also very commonplace for an English word to be used as a nonce word, for example when the speaker temporarily cannot remember the French word. This is particularly common with technical words; indeed, years ago before technical documentation began to be printed in French in Quebec, an English word might be the most common way for a French-speaking mechanic or other technical worker to refer to the mechanisms he or she had to deal with. It is often difficult or impossible to distinguish between such a nonce Anglicism and an English word quoted