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  2. 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 ...

  3. Electronic gear-shifting system - Wikipedia

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

    During shifting, this segment is pushed sideways by a relay operated mechanism like a railroad switch and picks up the chain that is currently running on the next cog. [2] In 1992 the French manufacturer Mavic introduced their first electronically controlled gear shift mechanism called Zap at the 1992 Tour de France. It was a prototype, but it ...

  4. 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.

  5. Comparison of hub gears - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_hub_gears

    5th gear 1550-2040 g City Shimano Nexus Inter-7: 1995 7 244% 1465-1860 g City Shimano Nexus Inter-5E 2019 5 263% 60 Nm 1st gear 1650 g e-bike Shimano Nexus 4 Speed 4 184% 1st gear City Shimano Nexus Inter-3: 3 187% 2nd gear 1220 g City SRAM Spectro E12 (Elan) 1995 1999 12 339% 3500-4000 g City SRAM i-Motion 9: 2005 2012 9 340% 2000g (w/o brake)-

  6. Shimano Total Integration - Wikipedia

    en.wikipedia.org/wiki/Shimano_Total_Integration

    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.

  7. Hub gear - Wikipedia

    en.wikipedia.org/wiki/Hub_gear

    Before epicyclic gears were used in bicycle hubs, they were used on tricycles. Patents for epicyclic hubs date from the mid-1880s. [5] [6] The first patent for a compact epicyclic hub gear was granted in 1895 to the American machinist Seward Thomas Johnson of Noblesville, Indiana, U.S.A. [7] This was a 2-speed but was not commercially successful.

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  9. List of bicycle parts - Wikipedia

    en.wikipedia.org/wiki/List_of_bicycle_parts

    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

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