A bicycle hub comprising a hub body, a cassette driver with a first end which has a stepped outer profile and a first bearing surface, a first sprag interfacing surface and a second bearing surface. The driver further comprises a support assembly, which may be a bearing assembly, which may be ball bearings. The hub further comprises a cylindrical sprag sleeve which is press fitted into the hub body. There is also a plurality of sprags, which may rotate with the driver while sliding relative to the sprag sleeve while the hub is in freewheeling mode. The space between the first sprag interfacing cylindrical surface and the second sprag interfacing cylindrical surface may be maintained constant and the sprags engagement delay may be less than one degree.
Freewheel hub
2019-10-02
Patent
Electronic Resource
English