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Hi, relatively new to cycling and noticed this on my rear wheel today. I don't know how it happened (I don't remember curbing the bike or anything) but when under braking it's making a "ch-ch-ch-ch" sound.
I did about 35-miles with it like this, and when I got home the brake block on that side seems fine as far as I can tell.
Can I just file this down with something - if so, what would be recommended to use? Or is a new wheel required?