[taurustrouble]

My left back tire has this loud scraping noise, mostly when i am at a slower mph, I looked at the tire and i can see metal scrapings on the inside of the tire, it is coming from the Rotors? or the flat disk behind the tire, i think my brake isn't rlelasing, or something else, but there is an obvious indentation all around the disk(rotor), snd i am jsut wonder what it might be? please help!!!!