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The first commercially successful electronic gear shift system for road bicycles was introduced by Shimano in 2009, the Di2. [3] Three professional teams used the Di2 in the 2009 Tour of California : Columbia High Road , Garmin Slipstream , and Rabobank ; [ 3 ] and several teams and riders, including George Hincapie , used it during the 2009 ...
Road bike shifter - integrated with brake levers, sometimes known as a "brifter". [ 2 ] In 1990, Shimano introduced their Shimano Total Integration , STI, shifting levers for road bicycles, this was an indexed shifting system and the first to integrate shifting with the brake levers.
Most road bicycles have two chainrings, and touring bicycles commonly have three. An electronic gear-shifting system enables riders to shift with electronic switches instead of using conventional control levers. The switches are connected by wire or wirelessly to a battery pack and to a small electric motor that drives the derailleur.
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C. Pushing the release lever towards the center of the bike upshifts one gear (right hand shifter) or changes from a large chainring to a smaller chainring (left hand shifter) Shimano Total Integration (STI) is a gearshift system designed by Shimano for racing bicycles. It combines the braking and gear shifting controls into the same component.
Electronic Gear-Shifting System: not simply a type of shifter or a type of derailleur, a complete system with switches instead of levers, wires instead of Bowden cables, and motor-driven derailleurs that must all work together; Fairing: a full or partial covering for a bicycle to reduce aerodynamic drag or to protect the rider from the elements