Scattered throughout other threads are comments and questions about tire noise and which tire are less noisy. Well, I did quite some research, mostly reading comments/reviews of tire customers of various tire vendors. There was one tire that stood out because many reviews stated that the tire was unexpectedly quiet. This tire was the Cooper Zeon RS3 G1 (actually both Cooper tires fitting the Model S had similar reviews). So I went and put some of these tires on my car and low and behold they are substantially quieter that the Goodyear Eagles with the silence foam or the Michelins. The biggest difference is on rough pavement. We have so far only 500 miles on them, but so far so good.