my frame is pinarello f10 and super record 12s mechanical.
after build at lbs, I found that the rear brake wire which go through the frame top tube get a sound touch the tube when brake.even when riding on uneven road.
so plz tell me how to do to avoid the problem?
a mechanic at other lbs told me that using inner lead wire to avoid that sound.
so could you guys tell me where to buy that wire used in the topbue?

sound video https://photos.app.goo.gl/uoCiAAr9XEzNhcXh7

so do you guys know that just only my pinarello f10 like that or it's a common? or just only with cp sr 12s?