Patent ID: 7562755

Claim:
A hub for bicycles, comprising: a hub axle, a hub shell arranged substantially concentric with said hub axle, at least two bearing units which are arranged substantially between said hub axle and said hub shell such that said hub shell is rotatably supported relative to said hub axle, a rotor which is rotatably supported relative to said hub axle and configured such that at least one sprocket can be arranged on said rotor, a freewheel device which is arranged between said rotor and said hub shell and which comprises two toothed disc units whose tooth faces are urged toward one another by a biasing device, for transmitting the drive torque from the rotor to the hub shell, wherein said two toothed disc units are disposed around the hub axle and in a correctly assembled hub they are, at least in the idle state, disposed transverse to the longitudinal direction of said hub axle, and at least one of said two toothed disc units having a toothed disc with a through hole and a radial wall and an axial wall having axial toothing, wherein the axial direction is parallel with the hub axle and the radial direction is transverse to the hub axle, wherein the inner diameter of the through hole is smaller at the axial wall than an inner dimension in the region of the radial wall such that a receiving space is formed at the at least one of said two toothed disc units around the hub axle between the inner diameter of the axial wall and the inner dimension of the radial wall, wherein at least one of said two toothed disc units is U-shaped in cross-section with the legs of the U-shaped cross-section extending radially inwardly toward the hub axle.