I bought a new bicycle about a month ago (this bicycle) and I have been having problems with the brakes. When I brake, it sounds as if metal is rubbing against metal. I went back to the shop a couple of times, they adjusted the brakes a little bit and told me that everything is fine. After a couple of days the problem reoccured. Here is a photo of the brake pad:
It looks like tiny pieces of metal are stuck in the brake pad. And here is a photo of the rim:
The rim looks like it chips a little bit or maybe is scratched. I see two options here: (1) I caught some debris from the road (2) The brake pads or/and rims are defective. I ride in relatively clean but dusty environment. Could this be caused by debris on the road? Could this be caused by defective brake pads? How could I solve this problem?
Any help is much appreciated!