Most tire stores will have sprares for normal cars , but not for Tesla. SO I checked at COstco tire and Wheel works - the tesla spare was a week of special order, but of course you can go to Tesla in a big city. So if you are travelling away from a big city then you are in trouble. Also a local garage does not know who to repair the Tesla tires as they have special foam inside the tire. I had an incident when tracelling to Yesomite national part, no repalcement tires at any tire store within 100 miles that I checked from mywife's run flat tires - I checked about tesla for future reference and they did not have the tesla tire either.
Also after you four year warranty expires so does the Tesla road side assistence. You have to buy a $5,000 extended warranty. When I asked my Tesla dealer if that include the roadside assistence they said no (I will double check if it is included). But anyway I was not planning to buy the extended warrantee. I have come to the conlcusion that Tesla is not for long trips.
When my wife's mercedes lease expires I will buy a car that has a small spare.
Tesla should have a added space for a small spare and charged $200 extra for the small spare. I would have not problems having small tire wheel well in the that in the front hood.