prex

Of course! You change the entire (en-tyre?) wheel, not just the tyre. I kind of assumed it was a twice a year thing that you would do at a tyre shop.
I imagine its a pain but it must feel good going from slippery summer ones to something that sticks - to ice!?

Tell me more about the sensors & winter tyres. They arent a thing where I live.

Is that in english or german?

Two devices? More engagement! Bonus time!