| 摘要 |
The invention concerns a bottom bracket assembly (1) of bicycle, comprising a shaft (2) extending along a predetermined longitudinal direction and a couple of bearings (31, 41) adapted to rotatably support said shaft (2) with respect to a housing box (10) provided in a bicycle frame, said bearings (31, 41) being mounted on said shaft (2) at opposite end portions (3, 4) of said shaft (2). Advantageously, said opposite end portions (3, 4) of said shaft (2) have an outer diameter (D2) comprised in the range between 28 mm and 37 mm, bounds being included, and the distance (D1) between the median planes (Y1, Y2) of said bearings (31, 41) along said longitudinal direction is comprised in the range between 80 mm and 100 mm, bounds being included. |
