I own a 2019 Rose XLITE carbon road bike with rim brakes.
Today, I conducted a thorough inspection, taking things apart. At the rear of the bike, on the attachment point where the brake is fixed to the frame, I found scratches. The brake also felt somewhat loose. I realized that the brake must have been slightly loose for some time now, as I adjusted it by hand two weeks ago on a ride with a flat tire.
I have never touched the bolt before. Tapping with a coin, I cannot find a dull spot. I removed everything and took these photos. I re-tightened the brake without any visible flex. Is this already carbon fiber damage? If so, is this a crucial spot?
I already went to my local bike shop. The owner did not even want to look at it and suggested contacting Rose.