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.