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變速車30速是什麼意思
變速車30速是什麼意思
更新时间:2024-11-16 02:55:24

  前面牙盤有三個盤,後面飛輪有10個,3x10就是三十,如果後面有9個就是27速,速别就是前面的盤的數量乘後面輪的數量,一般前面都是三個盤,主要是後面小飛輪的差距,常見的速别有18、21、24、27、30。

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