Hi, I purchased a CPO 2017 Q7 that came with the 21" and new Conti summer tires. One rim has some rash that I will need to have repaired.

It also came with some Pirelli winter tires from the previous owner that have maybe two seasons of use left.

Sorry for the newb questions, but would it be better to just swap out the winters or get a dedicated set of rims/winters?

I live in Denver if that helps. Also, there is a set of 18" 2014 OEM Q7 rims with Conti winters on Craigslist for less than $1,000, so would those fit? I don't think I need separate TPMS sensors due to Audi's system, but could someone confirm?