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2. Comparison of hub gears - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_hub_gears

   This page is a list of internal hub gears for bicycles. Brand Model Introduced ... Bafang RG A310.S.D 2022 3 165.1% ... 1st gear 1650 g e-bike Shimano Nexus 4 Speed 4

3. List of bicycle parts - Wikipedia

   en.wikipedia.org/wiki/List_of_bicycle_parts

   Hub dynamo: a generator inside one of the hubs for powering lights or other accessories; Hub gear: a gearbox mounted inside the hub, 3-speed is common, 5, 7 are available ("Sturmey-Archer"), Enviolo makes a CVT, and Rohloff makes a 14-speed hub. Cable operated by one or two cables; Indicator: a turn signal

4. Bicycle drivetrain systems - Wikipedia

   en.wikipedia.org/wiki/Bicycle_drivetrain_systems

   They can be used individually, as an external derailleur or an internal hub gear, or in combinations such as the SRAM Dual Drive, which uses a standard 8 or 9-speed cassette mounted on a three-speed internally geared hub, offering a similar gear range as a bicycle with a cassette and triple chainrings. Derailleur gears. Cogset; Crankset; Hub gear

5. 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.

6. Bicycle gearing - Wikipedia

   en.wikipedia.org/wiki/Bicycle_gearing

   One standard option for the Brompton folding bicycle is to use a 3-speed hub gear (roughly a 30% difference between gear ratios) in combination with a 2-speed derailleur gear (roughly a 15% difference) to give 6 distinct gear ratios; this is an example of half-step gearing. Some Brompton suppliers offer a 2-speed chainring 'Mountain Drive' as ...

7. SRAM Corporation - Wikipedia

   en.wikipedia.org/wiki/SRAM_Corporation

   In November 1997, SRAM acquired Sachs Bicycle Components, including a significant hub gear production line, from Mannesmann Sachs AG, a unit of German telecommunications group Mannesmann AG. Sachs had 1,250 employees and annual revenues of more than $125 million. [7] In 2013, production of internal gear hubs moved from Germany to Taiwan. [33]