An axle for removably retaining a wheel on a vehicle. The axle comprises a rotary-type connector at a first end thereof; a cam assembly operatively connected to the second end, the cam assembly including a cam having an axis of rotation; a lever operatively connected to a second end of the axle, said lever being rotatable about an axis substantially parallel to the axis of rotation of the cam, between an open position in which the axle is removable from and mountable on the vehicle and a closed position in which the axle is retained on the vehicle; and a cam assembly operatively connected to the second end; and a lever stop ensuring that an angle of maximum rotation for the lever from the closed position is less than 180 degrees.