| 摘要 |
Bottom bracket hub comprising a hollow spindle with two ball-bearings, said spindle having a relatively thin wall, and mountings permitting the axial adjustment of said spindle; a pair of ball-bearings are mounted on said spindles and a pair of inserts are fitted into the ends of said spindle. Alternatively, the inner races of said bearings are formed by cold-rolling the outer surface of said hollow spindle. |
