I have a 2009 G37x with 258,324 miles. The car has been great! About 40,000 ago I noticed a roaring noise when I get to about 35 mph and it gets louder as you increase speed. I had a set of HydroEdge tires with about 45,000 miles so when we rotated I had the tire store check the wheel bearing...they say everything ok the noise is from the tires cupping. Just put new goodyear GT eagles and the noise is still there...any ideas?
Thanks
Rick