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2. Electric bicycle - Wikipedia

   en.wikipedia.org/wiki/Electric_bicycle

   [citation needed] Hub motors were common in 19th century electric bicycle designs but fell out of favor until their resurgence in the 2000s. [12] Another type of electric assist motor is the mid-drive system, where the electric motor is not built into the wheel but is usually mounted beside or under the bottom bracket shell. The propulsion is ...

3. Motorized bicycle - Wikipedia

   en.wikipedia.org/wiki/Motorized_bicycle

   This is called "chain drive" and "belt drive" respectively. Besides connecting the engine to a sprocket, the engine can also be connected directly to the crank. This is called "crank drive" [43] or "mid-drive" [44] and also allows incorporating the gears of the bicycle in the motorized system. Most of these bikes and kits are under 50 cc and do ...

4. Electric bicycle laws - Wikipedia

   en.wikipedia.org/wiki/Electric_bicycle_laws

   A "mid-drive" or "crank-drive" motor set-up on an electric bicycle does indeed allow the operator to change gears in the power drive system between the motor and the rear wheel of the bicycle. Whether or not such a mechanism which allows the operator to change gears satisfies the wording that requires the operator to change gears is a matter of ...

5. Belt-driven bicycle - Wikipedia

   en.wikipedia.org/wiki/Belt-driven_bicycle

   [3] [12] The company’s CDX belt is the first belt drive designed for severe off-road use on mountain bikes. In 2010, Daimler introduced the Smart eBike, a power-electric hybrid bicycle featuring Gates Carbon drive-belt system. The eBike is designed for a clean, grease-free ride. [13] Other notable eBike brands include Grace and Pi-Mobility.

6. Pedelec - Wikipedia

   en.wikipedia.org/wiki/Pedelec

   Pedelec hub motor with gearbox Smart e-bike motor. Almost exclusively, pedelecs use DC motors, using commutator-less and brush disc motors, which are suitable for direct drive, and brush motors with gears. Hub motors were available with internal gears but most present ones use many poles, e.g. 84 electromagnets in the stator and 84 thin magnets ...

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