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
Ascent of the A-Word the book as an "often raucously funny account of what seems to be America’s most popular insult" which manages to be neither "exceedingly snarky" nor "overly academic and pretentious". Ascent of the A-Word Ascent of the A-Word: Assholism, the First Sixty Years is a 2012 book by the American linguist Geoffrey Nunberg which analyzes the history of the epithet "asshole". In "Ascent", Nunberg traces to World War II the origins of the word as an epithet, when it was used as a term of abuse for superior officers considered abusive or self-important. Following the soldiers' return home from the war,