The second eccentric member has an eccentrically placed crank pin in the form of a hollow needle bearing ring (2a) through which the drive shaft passes.
A seat tube is provided that does not extend to a bottom bracket of the bicycle.
Accordingly, the generator can be driven not only by the wheel of the bicycle but also by a crank hub axle.
A drive assembly (10) comprises one or more crank arms (11, 12) rotatable about a crank axis LC.
A drive transmission (10) comprising a carrier member (32) is mounted on a rotatable crank shaft (16) a plurality of spaced, pivotally mounted segments (58) each segment carrying a rotatable drive element.
In a third embodiment, each pedal (60) is connected by connecting rod (130) to crank arm (32) on crank (30).
An associated crank arm (10) has a first cavity disposed towards a crank axis end (12) of the crank arm.