I ended up going with slightly larger 265 40 22 Continental DWS. The shop was nervous, but they did fit!

Did you get your Model 3 We should meet up to check out our non-Porsche cars!

 

Looks like the bolt spacing, center bore, and offset is the same as a Ford Edge?

Not surprising considering Ford's previous ownership of Jag, will make it much easier to find wheels!

 

That's a pretty insignificant change from the 255/40, 1% taller and less than a half inch wider. I wouldn't expect great snow performance out of them, though I suppose a fair bit better than the P-Zeros!

Wife decided she wanted to keep her turbo Q5 so we ended up skipping the Tesla 3.

 

I had 20" DWS on my X5 and did just fine in the snow - and those were WAY wider - 315s I believe. For the use of this vehicle, these tires should be fine. It won't be making journeys to the mountains. We use my wife's XC90 for that.