| 摘要 |
The invention relates to a bottom bracket assembly (1) of a bicycle, comprising a shaft (2) having an axis (X-X) extending along a longitudinal direction, a left crank arm (40) associated with a first end portion (4) of said shaft (2) and a right crank arm (30) associated with a second end portion (3) of said shaft (2). The assembly (1) also comprises a through-cavity (2a) extending along said longitudinal direction and entirely passing without any obstructions through said left crank arm (40), said shaft (2) and said right crank arm (30). |
