Another forum member just PM'd me about his tire pressures. Seems when he had his TPMS reset done the pressure in all four tires came up ten pounds low. I had the same experience. I hadn't checked my tires because I knew that Tesla had inflated them properly, and even watched them recheck the pressures after they installed the winter wheels on my car. Unfortunately there's one catch - it's winter! The wheels were installed and checked indoors. My TPMS wasn't working because the tool wasn't available when I picked up my car. Tire pressures drop when the temperature drops. You need to adjust your tire pressures seasonally, to maintain the same cold inflation level. If your TPMS hasn't been synchronized with your wheels for whatever reason, please check your pressures! Do this when the car has been sitting outside in seasonal temperatures for a couple of hours. Tesla recommends 45 psi for the Pirellis, but you can run them as low as 40. A bit lower pressure might provide better traction, while the higher pressure would give you better range.