A bicycle includes a frame and a wheel rotatably mounted in relation
thereto. The wheel is drivable by two pedal devices including
pedal-equipped arms. The two pedal devices are individually mounted in
different bearings and connected to the wheel via two different
transmissions, which separately co-operates with a mechanical clutch. The
clutch includes a dog being movable to and from opposite shoulder surfaces
of which a first one guarantees driving the wheel when the dog, in an
active state, is pressed against the first shoulder, and the second
shoulder gives rise to noise when the dog, in an inactive state, collides
with the second shoulder.
