A bicycle bottom bracket assembly is provided with a pair of bearing support members, and a pair of axle bearings so that the bottom bracket assembly is configured and arranged to be mounted into a hanger part of a bicycle frame. The hanger part has opposite open ends. The bearing support members are press-fitted into opposite open ends of the hanger part. The bearings are retained in the bearing support members such that the bearings are disposed inside of the hanger part with outer races of each of the bearings engaging one of the bearing support members. A crank axle is rotatably supported within the hanger part by inner races of the bearings with a first axial end portion of the crank axle being disposed at one end of the hanger part and a second axial end portion of the crank axle being disposed at the other end of the hanger part.

 
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