It is concave. So, it is nothing.

来源: jassco 于 2020-12-10 19:17:56 [] [旧帖] [给我悄悄话] 阅读数 : (130 bytes)
回答: 刹车DISC上的同心圆 由 ben2003 于 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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