A crank arm of a bicycle having an effective crank arm length that can be selectively
adjusted for increasing the comfort and performance of the rider. The crank arm
includes a crank arm member rotatably connected about a crank arm member rotational
axis to a base member. The base member includes a spindle bore defining a spindle
rotational axis, which is eccentric with respect to the crank arm member rotational
axis. The opposite end of the crank arm member includes a pedal bore defining a
pedal rotational axis. The crank arm further includes a fastener to selectively
couple the base member to the crank arm member for rotation therewith.
