It is concave. So, it is nothing.

來源: jassco 於 2020-12-10 19:17:56 [] [舊帖] [給我悄悄話] 閱讀數 : (130 bytes)
回答: 刹車DISC上的同心圓 由 ben2003 於 2020-12-10 08:57:18

Don't worry about it. Just replace your pads when they get worn out.

Best regards,

Alex

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