We are excited to get our first allotment of Michelin's new Pilot Super Sport Acoustic tire in both 245/35R21 and 265/35R21 sizes. (No work on when we will see the tire in 245/45R19, sorry). Michelin has developed a custom designed polyurethane foam that adheres to the inner shell of the tire that helps decrease road and impact noise. This new feature, combined with the superior traction that we have enjoyed from the Pilot Super Sport from its introduction a few years ago, makes the Pilot Super Sport Acoustic an outstanding option for any Model S owner looking to maximize (summer only) traction and minimize road noise ! I'll have more information as we have a chance to get to know the tire better !