I have the same problem on my falkens. Since you have Parada-2's, it might be because we have performance tires and they just relaly like to grab anything on the road, ruts, bumps, etc. I recently painted my calipers so I know my calipers are not seized. Could just be the type of tire. I havne't really noticed it now that I am on my winter tires. Just a thought, not sure if this is true.