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  2. Electronic gear-shifting system - Wikipedia

    en.wikipedia.org/wiki/Electronic_gear-shifting...

    Finally, the entire 7970 groupset weighs approximately 113 grams (4.0 oz) less than the 7800 it replaces but 68 grams (2.4 oz) more than the new 7900. [17] In 2011 Shimano introduced the Ultegra Di2 [18] electronic gear change set, a cheaper version of the electronic Dura-Ace system. This set seemed to provide an electronic option within reach ...

  3. Groupset - Wikipedia

    en.wikipedia.org/wiki/Groupset

    A groupset or gruppo (from the Italian for "group", sometimes misspelled grouppo) is a bicycle component manufacturer's organized collection of mechanical parts. It generally refers to all of the components that make up a bicycle excluding the bicycle frame , fork , stem, wheels , tires, and rider contact points, such as the saddle and handlebars .

  4. Shimano - Wikipedia

    en.wikipedia.org/wiki/Shimano

    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.

  5. Shimano Launches 12-Speed GRX Di2...and its 2x Only

    www.aol.com/shimano-launches-12-speed-grx...

    Deputy Editor Tara Seplavy reviews the latest Shimano GRX Di2 12-speed components—it’s only 2x, which will disappoint many 1x drivetrain-loving gravel riders.

  6. Racing bicycle - Wikipedia

    en.wikipedia.org/wiki/Racing_bicycle

    The system did not catch on due to technological hurdles. In 2009, Shimano commercially released the Dura-Ace Di2 electronic shifter, and Campagnolo and SRAM followed suit in the early 2010s. As of 2022, the vast majority of top-level professional teams use electronic shifting, as do many amateur riders.

  7. Shimano Total Integration - Wikipedia

    en.wikipedia.org/wiki/Shimano_Total_Integration

    Shimano STI Dual Control shifter and brake lever: 1. Main lever 2. Release lever A. Pulling the main lever towards the rider applies the brake B. Pushing the main lever towards the center of the bike downshifts one, two or three gears depending on how far the lever is pushed (right hand shifter) or changes from a small chainring to a larger chainring (left hand shifter)

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