I'm wondering if my tires have a problem. I have the Pirelli P7000 Supersports in 215/45/17 on 7.5" wide wheels on my 325ic. They absolutely DRONE noise !!! They didn't start out this noisy, but began to be so after about 10K miles. They have about 20K on them now. I got them for the all-season capability. Is this NORMAL???? I don't see any patent wear problems, but I might not know what I should be looking for. When slowing to a stop, they get even LOUDER. I plan to at least finish the winter with them....if nothing can be done, what is the quietest tire you can recommend (doesn't HAVE to be all season) in 225/45/17 ( I plan to get those rather than the 215)