Bicycle hub

In a bicycle hub having a hub shaft, a hub body comprising:

• a hub shell and a pair of hub flanges provided at both axial ends of said hub shell, a pair of first and second bearings supporting said hub body rotatably to said hub shaft, and a drive unit incorporated with said hub body for driving said hub body, said drive unit having a frustum-like cone, a cylindrical driving member, at least one sprocket, a pair of bearings for supporting said driving member rotatably to said cone, and a unidirectional rotary transmission inserted between said driving member and said cone, wherein the improvement comprises said hub body having at its one axial end supported by said first bearing a tubular mount extending axially outward from said hub body, said tubular mount having at its outer periphery an external spline extending axially from the same, said cone at said drive unit being provided at the inner periphery of one axial end thereof with an internal spline to be fit with said external spline at said mount, said cone having at its axially intermediate portion the inner periphery in continuation with said internal spline, said inner periphery having an inner diameter fit to the outer periphery of said tubular extension, at least one of said bearings being screwed to said hub shaft, whereby said drive unit is detachably connected to said hub body, and said drive unit including said cone is spline fit to said tubular mount at the hub body and supported by said tubular extension thereof.