I did a lot of research on winter tire pricing and am sharing the info here so it can be helpful to others.
Note I am in the state of PA so your pricing may be different.
Tesla offers an 18” wheel and winter tire package featuring the Pirelli Sotozero Serie II tire for $2,000.
TSportline offers an 18” wheel and winter tire package featuring the X Ice Xi3 for $2,850 shipped.
Tesla offers a 19” wheel and winter tire package featuring the Pirelli Sotozero 3 tire for $3,500.
TSportline 18” wheels without tire and TPMS shipped is $1,680.
Tesla 18” wheels (without aero hubcaps) and TPMS picked up at my local service center is around $1,185 plus tax.
The Tesla service station in my area will mount and balance wheels and tires for around $125.
Tesla will make you sign a waiver if they mount non OEM wheels and tires. Tesla will not give you a complimentary tire swap in the winter if you mount a non OEM tire on their wheel.
Tesla will swap out your summer wheels and tires for winter wheels and tires at a price of around $75.
I heard great reviews on the Michelin X Ice Xi3 tire and Pirelli Sotozero 3 tire. The X Ice is a winter studless tire and the Pirelli is a winter performance tire. The Pirelli Serie II tire on the 18” winter tire package has “ok” reviews, but the Pirelli 3 winter tire on the 19” winter tire package has much better reviews. I found the Pirelli brand should be less squirmy and it is made for high performance vehicles, but lacks some winter handling qualities that the Michelin X Ice tire excels at. The Pirelli 3 tire can be found in an 18” tire size, but the load rating is not “spec” for a Tesla Model 3. The 18” X Ice tire meets Tesla load ratings as far as I can tell.
The Blizzak WS90 was also highly recommended to me by my local garage, but they said the tire is very soft and should not be run in warm weather and can feel squirmy under high power, which the Tesla has.
Pricing is fairly similar across the board for these tires in the $210 each range. I found a decent sale on the X Ice Xi3 tire on Walmart’s website and bought a set for just under $200 per tire with free shipping. My local garage who has handled my Tesla before will mount and balance the wheels and tires for less than Tesla charges, and then I don’t need to sign a waiver from Tesla either. Total cost for an 18” Tesla OEM wheel set and X Ice Xi3 tire combo should be about $2,100 which I feel is better for my application compared to the $2,000 Tesla 18” wheel and Pirelli Serie II tire package on their website.