Noun
chain drive (plural chain drives)
A transmission system in which power is transferred to the wheels (for example), by means of a chain.
A bicycle with shaft drive instead of a chain With a chain drive transmission, a chainring attached to a crank drives the chain, which in turn rotates the rear wheel via the rear sprocket(s) ( cassette or freewheel ). Source: Internet
Example: bicycle chain drive Mechanical advantage in different gears of a bicycle. Source: Internet
In 1896, Frederick and his brother built the first gasoline-driven car in England: a single cylinder convert internal combustion engine with chain drive. Source: Internet