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2. Electronic gear-shifting system - Wikipedia

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

   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 ...

3. The 7 Best Road Bike Tires For Training and Race Day - AOL

   www.aol.com/lifestyle/7-best-road-bike-tires...

   The Best Road Bike Tires. Best Overall: Continental Grand Prix 5000 All-Season TR. Best Value: Continental Grand Prix 5000 Clincher. Best Racing Tire: Vittoria Corsa Pro. Best Training Tire ...

4. ISO 5775 - Wikipedia

   en.wikipedia.org/wiki/ISO_5775

   ISO 5775 is an international standard for labeling the size of bicycle tires and rims. The system used was originally developed by the European Tyre and Rim Technical Organisation (ETRTO). It is designed to make tire sizing consistent and clear.

5. Derailleur - Wikipedia

   en.wikipedia.org/wiki/Derailleur

   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. Although expensive, an electronic system could save a racing cyclist time when changing ...

6. 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)

7. Shifter (bicycle part) - Wikipedia

   en.wikipedia.org/wiki/Shifter_(bicycle_part)

   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.