[問題] 摩擦
騎車的時候(不踩踏板或是向後踩空轉)
那塊塑膠隔板會和鋼絲摩擦產生異音
想請問有沒有辦法解決…
要拆下來磨還是說只能這樣?
http://i.imgur.com/ncXzqRX.jpg

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