Abstract: An automatic free-coasting freewheel (AFF) having: a free-coasting state; an engaged state and a freewheeling state, the AFF comprising: a driving member; an inertial unit; a driven member; a freewheeling biasing member; and an axis of rotation defining an axle; wherein the driving member, driven member and inertial unit are coaxially mounted onto the axle and rotatable thereupon, the driving member configured to controllably rotate relative to the inertia unit; the driving and driven members having angular velocities: ?DRIVING and ?DRIVEN; and angular accelerations ?DRIVING and ?DRIVEN; the inertial unit further comprising a suspension member configured with at least one set of: a locking member and a free-coasting biasing member; wherein the inertial unit is configured to interact between the driving and the driven member to automatically shift between the states, depending upon ?DRIVING versus a threshold value (?MIN) and ?DRIVEN and ?DRIVING.