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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 ...
Now in 2019, Shimano creates non-proprietary as well as proprietary bottom bracket designs such as HollowTech II and BBR60. Many "non OEM" part manufacturers have created bottom bracket conversion kits, giving consumers the ability to install crank sets designed for one standard into another (Example BB/PF30 cranks into a 22/24mm spindle). [32 ...
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.
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)
For 12-speed, Shimano introduced a new freehub body as well (Microspline). This progression has provided more fine adjustment of gear ratio, however the use of thinner metal parts has had the effect of shortening the life-span of the chain and sprockets due to so called "stretching" of the chain. This is caused by frictional abrasion of the ...
Shimano XT front derailleur (top pull, bottom swing, triple cage) Shimano E-type front derailleur (top pull, top swing, triple cage) SRAM Red Black Edition front derailleur with clamp-band. The front derailleur only has to move the chain side to side between the front chainrings, but it has to do this with the top, taut portion of the chain.
A high gear of 50×11 on a compact drivechain is actually slightly higher than the 53×12 of a standard set. Compact gearing usually has a large percentage jump between the two chainrings. In balance, it may also allow small jumps in the rear by allowing a closer ratio cassette to be used, except for the 9% jump at the high end between the 11 ...
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