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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 Tour de ...

3. Bicycle gearing - Wikipedia

   en.wikipedia.org/wiki/Bicycle_gearing

   A single-speed bicycle is a type of bicycle with a single gear ratio and a freewheel mechanism. These bicycles are without derailleur gears, hub gearing or other methods for varying the gear ratio of the bicycle. Adult single-speed bicycles typically have a gear ratio of between 55 and 75 gear inches, depending on the rider and the anticipated ...

4. Climb Easier And Faster With These Electric Mountain Bikes - AOL

   www.aol.com/lifestyle/best-electric-mountain...

   Here are the best-tested electric mountain bikes of 2024 ... Best Enduro: Yeti 160E. Best Women's ... Both are reputable manufacturers that offer reliable shifting and a wide-ranging gear set. ...

5. NuVinci continuously variable transmission - Wikipedia

   en.wikipedia.org/wiki/NuVinci_Continuously...

   The only application currently commercialized is the internally geared bicycle hub. The NuVinci CVT replaces derailleurs and other internally geared hubs, and provides a gear ratio range of about 350%, similar to that on bicycles with 8- or 9-speed hub gears, or with double chain rings (most racing or fast road bicycles). [12]

6. From Trail-Ripping Gravel Rides to Reliable Work Commuters ...

   www.aol.com/lifestyle/best-bikes-women-161200170...

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7. Derailleur - Wikipedia

   en.wikipedia.org/wiki/Derailleur

   To shift gears, the rider first moves the lever enough for the chain to jump to the next sprocket, and then adjusts the lever a slight amount to center the chain on that sprocket. An indexed shifter has a detent or ratchet mechanism which stops the gear lever, and hence the cable and the derailleur, after moving a specific distance with each ...