Patent ID: 8590421

Claim:
Bicycle bottom bracket assembly, comprising: a shaft having a longitudinal axis X-X extending along a predetermined direction; a pair of bearings that rotatably support said shaft with respect to a housing box of a bottom bracket assembly in a bicycle frame, said box having an axial extent along said longitudinal axis X-X and opposite free ends; a pair of adapter devices associated with said opposite free ends of said box to support said bearings with respect to said box; at least one adapter device of said pair of adapter devices comprising at least one first stop element and at least one second stop element arranged on opposite sides with respect to at least one bearing of said pair of bearings, in which said at least one first stop element and at least one second stop element cooperate to keep said at least one bearing inside a space having a predetermined axial extension, and said at least one adapter device including a first portion having a first diameter arranged outside of said axial extent of said box, a second portion having a second diameter less than said first diameter arranged inside of said axial extent of said box, and said first portion has an aperture that receives a portion of said at least one second stop element, wherein said aperture comprises at least one through hole extending radially.