I have been given the same run around by the dealer telling me that it is normal for these type of tires. I notice it between 30-40 mph when coasting. It has never gotten as bad as what some of these posts are saying, but it is definately enough to get your attention... If anyone knows of a definite fix to this I would be interested to hear about it. It hasn't been doing it too bad lately, but it is interesting to know that other people are experiencing the same thing...