Michelin X-Ice Xi3 http://www.tirerack.com/tires/tires.jsp?tireMake=Michelin&tireModel=X-Ice+Xi3&partnum=445HR9XI3XL&autoMake=Tesla&autoYear=2013&autoModel=Model+S+Performance&autoModClar= Michelin Pilot Sport 3 http://www.tirerack.com/tires/tires.jsp?tireMake=Michelin&tireModel=Pilot+Sport+3&partnum=445YR9PS3XL&vehicleSearch=true&fromCompare1=yes&autoMake=Tesla&autoYear=2013&autoModel=Model%20S%20Performance&autoModClar= Michelin Pilot Sport A/S 3 (W- or Y-Speed Rated) http://www.tirerack.com/tires/tires.jsp?tireMake=Michelin&tireModel=Pilot+Sport+A%2FS+3+%28W-+or+Y-Speed+Rated%29&partnum=445YR9PSAS3&autoMake=Tesla&autoYear=2013&autoModel=Model+S+Performance&autoModClar= Whenever I'm due for new tires, I was looking to switch to Michelins (always had good experience with them on other cars). I had planned on going to MXM4s, but now some new tires have shown up on tirerack which sparked my interested. While I understand the SCs won't mount anything other than OEM (aka MXM4s), (meaning I'll have to find a shop to mount them) the tire that has caught my eye are these "Michelin Pilot Sport A/S 3" 19s. Size: 245/45ZR19 5-Rib Tread Design Sidewall Style: Blackwall Serv. Desc: 98Y UTQG: 500 AA A There are a few reviews on there, all very positive. Description: The most important things to me are (1) grip in wet weather (2) treadwear life and (3) grip in dry weather grip in wet weather is most important (my P85 is technically my "family" car, and I do not risk safety). I also dont want to be replacing tires every 15k miles (eliminates summer tires with low treads). but the 3rd thing that is important is MORE GRIP THAN MY OEM STOCK GOODYEARS. yes the goodyears slip under heavy acceleration from a stop. So if these new Pilot Sports are as good as their specs and reviews, these might well be a good candidate for an upgrade... any opinions on these?