Aside from obvious scratches from debris in pads, look for any pitting/bubbling. When I was looking into getting some (probably still will when I want grey rims for something...) I read that some of them can develop this defect. My thoughts are that this is probably due to the coating not completely sealing in aluminium, and it subquently oxidising beneath the coating.
Aside from obvious scratches from debris in pads, look for any pitting/bubbling. When I was looking into getting some (probably still will when I want grey rims for something...) I read that some of them can develop this defect. My thoughts are that this is probably due to the coating not completely sealing in aluminium, and it subquently oxidising beneath the coating.