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Josē
@ffm
Trying to work out the cause of a rumble in my drivetrain (Campag 10spd). It's from the sprockets (or that area) and doesn't seem to be a rubbing, more like every engagement/disengagement of a link with the sprockets has a slight bump that combines into a rumbling noise. It's mainly noticeable in the smallest 3 sprockets because the frequency of it drops to a level where it's really noticeable and feeds back through the frame and pedals.
Chain isn't worn according to my checker. Thoughts?