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2. Electronic gear-shifting system - Wikipedia

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

   Electronic front derailleur (Shimano Di2) An electronic gear-shifting system is a method of changing gears on a bicycle, which enables riders to shift with electronic switches instead of using conventional control levers and mechanical cables.

3. List of bicycle parts - Wikipedia

   en.wikipedia.org/wiki/List_of_bicycle_parts

   Portage strap: a strap (usually made of leather) attached to the inside of the bike frame, designed to make carrying the bike over one's shoulder easier; Pulley wheel: see Jockey wheel; Power meter: a device on a bicycle that measures the power output of the rider; Quick release: a skewer with a lever on one end that loosens when the lever is ...

4. Whizzer (motorcycles) - Wikipedia

   en.wikipedia.org/wiki/Whizzer_(motorcycles)

   Whizzer bicycle engines are a line of bicycle engines that were produced in the United States from 1939 to 1965. They were commonly sold as kits to be assembled and attached to a consumer's bicycle thus creating a motorized bicycle. Whizzer U.S.A. re-appeared in 1997 to sell an improved version, pre-assembled on an old Schwinn-style bicycle frame.

5. Motorized bicycle - Wikipedia

   en.wikipedia.org/wiki/Motorized_bicycle

   The Consumer Product Safety Act defines the term low speed electric bicycle as a two- or three-wheeled vehicle with fully operable pedals and an electric motor of less than 750 watts (1 horsepower), whose maximum speed on a paved level surface, when powered solely by such a motor while ridden by an operator who weighs 170 pounds, is less than ...

6. List of bicycle types - Wikipedia

   en.wikipedia.org/wiki/List_of_bicycle_types

   A motorized bicycle provides motor assistance. (Not to be confused with motorcycles or electric motorcycles and scooters.) An electric bicycle, also called an e-bike, is primarily propelled by the rider, but with assistance provided by an electric motor; usually located in the hub of the front or rear wheel. The electric motor is powered by a ...

7. Pedelec - Wikipedia

   en.wikipedia.org/wiki/Pedelec

   Deutsche Bahn pedelecs with rear hub motors and batteries placed inside the frames.This is the "Jetstream" from Riese und Müller.. A Pedelec (from pedal electric cycle) or EPAC (electronically power assisted cycle), is a type of low-powered electric bicycle where the rider's pedalling is assisted by a small electric motor.