Motorized bicycle

A motorized bicycle is a bicycle with a motor or engine and transmission used either to power the vehicle unassisted, or to assist with pedaling. Since it sometimes retains both pedals and a discrete connected drive for rider-powered propulsion, the motorized bicycle is in technical terms a true bicycle, albeit a power-assisted one. Typically they are incapable of speeds above 52 km/h (32 mph); however, in recent years larger motors have been built, allowing bikes to reach speeds of upwards of 141.

6 km/h.

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Source: Wikipedia · Image: Wikimedia Commons · CC BY 2.0

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