MY with ~11k miles and the front tires (only the front) and seem to have damage in the form of rubber chunks coming off. City/highway driving, fairly good roads, have never driven the car off-road, we don't have winter weather - is this a known issue or seem weird? The tread depth is ok, the issue is just the way they seem to be falling apart. I didn't have this on my M3 summer or winter tiles (when I did live in a place with extreme winter weather)