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As of 2009, one system was commercially available from a major parts manufacturer: Shimano's Di2 (Dura-Ace 7970) for road bicycles. While the traditional method of gear shifting uses mechanical control levers that pull and release Bowden cables and spring-loaded derailleurs, Di2 is controlled by electronic switches located either in the ...
Notice that these family names do not give the exact shift ratios: the 2:1 shift ratio is in fact about 1.7 (Or 1.9 on the Dura Ace series up to 7400) rather than 2, and the native SRAM shift ratio is about 1.1. The family names of these standards are reversed by some in actuation ratio notation as opposed to that of the more common shift ratio.
Shimano, Inc. (株式会社シマノ, Kabushiki-gaisha Shimano), originally Shimano Iron Works (島野鐵工所) and later Shimano Industries, Inc. (島野工業株式会社), is a Japanese multinational manufacturing company for cycling components, fishing tackle and rowing equipment, which also produced golf supplies until 2005 and snowboarding gear until 2008.
Russian President Vladimir Putin on Monday accused the West of pushing Russia to its "red lines" - situations it has publicly made clear it will not tolerate - and said Moscow had been forced to ...
Manufacturers typically offer a range of several groupsets, each targeted at a different budget or use. For instance, Dura-Ace, Super Record and Red are the top-of-the-line road racing groupsets for Shimano, Campagnolo and SRAM respectively while Claris, Veloce and Apex are their entry level road racing group sets, respectively.
Police in have revealed tragic new details behind the mysterious death of a 26-year-old Polish newlywed two years after she was found on the streets of Miami.
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