| 摘要 |
A bicycle freewheel gear cluster mounting structure including a wheel hub having a toothed hole and a circular recess around two opposite ends of a longitudinal center through hole thereof; a lock nut mounted within the circular recess to hold a bearing assembly and a freewheel gear cluster around the bearing assembly; and a hollow T-rod having a toothed head at one end meshed with the toothed hole on the wheel hub and a screw rod section at an opposite end inserted through the longitudinal center through hole of the wheel hub and threaded into the lock nut.
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