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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 ...
A bicycle shifter or gear control or gear levers is a component used to control the gearing mechanisms and select the desired gear ratio. Typically, they operate either a derailleur mechanism or an internal hub gear mechanism. In either case, the control is operated by moving a cable that connects the shifter to the gear mechanism.
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.
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)
best road simulated road feel Tacx Neo 2T The Neo 2T is similar to the Kickr in both power measurement (up to 2,200 watts within 1 percent accuracy) and maximum gradient simulated (up to 25 percent).
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