It has probably been 15 years since I had a flat tire, and of course I get one in the car that does not have a spare kit.... Contacted Tesla through the mobile app, dude showed up 25 min later and put a loaner on, and Tesla repair was at my office at 830 this morning and had the tire patched and back on the car in 20 min. For the sake of being comfortable on road trips, I am going to keep a patch kit in the car which the tech confirmed I could use, and a little battery compressor should I get a flat out of cell range. Otherwise, 5 stars for Tesla roadside assistance in Denver.