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 among the clergy. French was therefore, at first, spoken in England under the form of this Anglo-Norman dialect. During the 12th century, continental French had a greater influence on Old English. It acquired great prestige in England, especially within the aristocracy and the clergy. It became the language of law and justice nationwide. Rich and noble families, most of them of Norman origin, taught their children French or sent them to study in France. The expansion of the French language in England was also encouraged by royal marriages. From Henry II Plantagenet and Eleanor of Aquitaine at the beginning of