Patent ID: 8689662

Claim:
A bottom bracket assembly in a bicycle, comprising: a shaft having a predetermined diameter and extending along a predetermined longitudinal direction, said shaft having opposite ends with at least one of the opposite ends having at least one shoulder with a diameter greater than the predetermined diameter of the shaft; a housing box having an inner surface with at least one shoulder formed thereon; a pair of bearings that are mounted on opposite ends of the shaft and rotatably support the shaft with respect to the housing box, and at least one of the bearings is in abutment with the at least one shoulder formed on the inner surface of the housing box and with the at least one shoulder defined on the shaft; and wherein the distance between the median planes of the bearings along the longitudinal direction is in the range between 80 mm and 100 mm, bounds being included, and the shaft has an outer diameter that maintains a constant value between the median planes of the bearings.