Recently I have started hearing a weird metallic noise coming from my front passenger tire. It sounds like keys rattling (no, my keys are not rattling) and I can only hear it when I am passing someone or on a bridge. I thought maybe it was my wheel bearing going bad so I jacked it up and tried rocking the tire, it was rock solid. I started to rotate my tire and the noise seems to be coming from my breaks. It looks as though my calipers are making contact with the disc. I may be completely wrong though. My breaks work fine, no grinding noise while turning, there are no vibrations and it tracks in a straight line.