Why would anyone order a Winter Tire/Wheel combo from Tesla when you can get a cheaper/nicer set from TireRack.com? They will install the TPMS sensors, mount the tires, balance the wheels and send them directly to you. You also have more choices in your selection of tires, wheels, and sizing. I'm all in with a nice set of black wheels and Pirelli Scorpions (staggered sizing) for about $2350 delivered:
255/45R-20 Pirelli Scorpion Winter XL (Fronts)
20x8.5 KMC KM696 Pivot BLK PAINT (Fronts)
275/45R-20 Pirelli Scorpion Winter XL (Rears)
20x9.5 KMC KM696 Pivot BLK PAINT (Rears)
433MHz Tire Pressure Sensors