Bearing assembly for a bottom bracket of a bicycle

A bearing assembly of a bottom bracket for a bicycle, said bottom bracket comprising an axle, at least one bearing, a tube and a housing, said tube engaged in an inner periphery of said housing and said axle rotatably engaged in an inner periphery of said tube by said bearing, said tube having at least one annular recess defined in said inner periphery thereof and said axle having a threaded portion for threadedly engaging to a race which has an annular recess defined in an outer periphery thereof, said bearing being received between said annular recess of said tube and said annular recess of said race;

• an abutment between said tube and said bearing defining a first arc on a vertical plane passing through a center of said bearing, said first arc having an upper distal point or a lower distal point, said upper distal point located in the first or the second quadrant of a right-angle coordinate which has an origin of ordinates at said center of said bearing;
• an abutment between said race and said bearing defining a second arc on said vertical plane passing through said center of said bearing, said second arc having an upper distal point or a lower distal point, said lower distal point located in the third or the fourth quadrant, respective to the distal points of the first arc, of said vertical plane passing through said center of said bearing.