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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 ...
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 .
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.
Dura Automotive Systems (shortened to Dura) is an independent designer and manufacturer of automotive components, including control systems, exterior systems and lightweight structural systems. Dura markets its automotive products to every North American, Asian and European original equipment manufacturers (OEMs) and many leading Tier 1 ...
The new groupset made use of a 10-42 cassette and a patented single front chainring that made use of both narrow and wide teeth to retain the chain without a chain guide. The rear derailleur for the groupset uses a parallelogram that moves only laterally, known as X-Horizon, which is intended to improve shifting precision and chain retention. [14]
Anniversary groupset to mark 50 years of Campagnolo bicycle parts. 1985 Campagnolo creates Delta brakes, with a parallelogram linkage to actuate the calipers. Iconical Campagnolo Delta brake calipers from the 1980s. 1986 The re-designed Record road and track groupsets (also known as C-Record) are introduced, replacing Super Record as the top of ...