I'm looking for some advice for an upcoming trip and have read all 23 pages of this thread with interest. Not sure if I gleaned an answer for this case. In one month I'll be driving my Model S from SoCal to Park City with 2 passengers, a dog and a roof rack of skis. Staying at a house up in Deer Valley for 2 weeks. I've got the stock 19" Goodyear all-seasons with 15k miles (showing very little wear). It's a straight shot up I-15 at 75mph, about 100 miles of high mountain pass and then a fairly steep climb of ~5 miles from Park City up to the house. I've done it many times, usually in an AWD Volvo with all-seasons. Needed chains one time in 6 years.
Option 1: Go with the tires I have (carry chains of course) and just avoid making the drive up or back during weather (my sched is flexible). The Volvo will be there, so it's an option to leave the Tesla parked in the garage if it snows during our stay (I hope it does!).
Option 2: Don't dork around; Get the TireRack Rials with Michelin Xi3s and TPMS for about $2200. Mount them a week before the trip and remove them when I get home. I picked the Michelins based on comments here about the road noise. I don't want to drive my passengers crazy after 500 miles on smooth/dry interstate. Find some place around my house with very little storage to keep them. Put them back on 11 mos later the next time I go to PC in winter. It's really the only winter driving I do.
I realize this is subjective but most of the discussion here deals with people who live in winter-time areas as opposed to visit it for brief periods once a year. $2200 is 5 days of skiing for 4 of us so it's not chump change.
Thanks in advance for any suggestions, advice.