I experienced the tire vibration on my 100+ mile trip home after picking up our new car. A few of you helped steer me in the right direction by getting Pilot Sport As3's put on under warranty. I had that done earlier today, but have snow wheels/tires on now so I have zero feedback to offer on the new ones. I can't get over how odd Pirellis decision was to add foam to the inside of the tire. I have had hundreds of tires put on all sorts of cars and have never seen or heard of this before. I didn't bother asking, but does anyone know if Volvo did this with the AS3 replacement tires as well? Just wondering if this is Volvo trying to cut down on road noise complaints or if it was Pirelli trying to make up for a lousy tire design. Nice of Volvo to give me both sets of tires, but I guess I don't really have a use for them.