Derailleur gears a detent or ratchet mechanism which stops the gear lever, and hence the cable and the derailleur, after moving a specific distance with each press or pull. Indexed shifters require re-calibration when cables stretch and parts get damaged or swapped. On racing bicycles, 10-gear rear cassettes appeared in 2000, and 11-gear cassettes appeared in 2009. Most current mountain bicycles have either. Many modern, high-end mountain bikes have begun using entirely one chain ring drivetrains, with the industry constantly pushing the number of rear cogs up and up, as shown by SRAM's Eagle groupsets (1 by 12) and Rotor's recent 1
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