钢圈大概只要60刀。但如你现在是用的合金圈，不建议downgrade。到是可以趁机upgrade。

来源: yanif 于 2014-11-20 19:33:06 [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.