I live in CT where the pilot a/s 3 oem tire will get me stranded somewhere in a hurry when the snow starts flying. I've long been a fan of the Michelin Pilot Alpin 3 on previous cars and the latest generation Alpin 4 is now available in a size close to our 245/45/19. There is a Porsche specific 255/45/19 N sped tires as listed below. Can anyone say with certainty if the tires load rating is enough? http://www.tirerack.com/tires/tires.jsp?tireMake=Michelin&tireModel=Pilot+Alpin+PA4+N-Spec&partnum=545VR9PA4N1 Or anyone have another reason I should go with these?