Needed some help for a winter set!

Hello Guys!

Question here! I’m about to buy a winterset for the times i visit the alps.

Read alot online and i know there are a couple of threads about this.

The problem is that i’m not sure if i would stay with the stock 8J size rims or maybe fit some 8,5. With that i’m not sure to stick with the stock ET44 or maybe go a bit lower like 40 or maybe 35.

Also then i’m thinking if i should go with the minimal difference in tyre roll size compared to stock so 235/45/18 or maybe go with the 245/45/18..

Planning on lowering my superb sportline combi iV with some eibach pro’s in the future and dont want any rubbing with a roofbox, and loaded trunk and 2 kids in the back..

Can you guys give a little help on this and maybe some pro’s and con’s?

P.S. i need snow chains in Austria but i’m planning on buying some tread chains because of the little room with these dimensions. I know skoda only advises 17 or 16” with the “normal chains”, but i saw that the tread chains (dont know if its the right word) are made for smaller gaps in the arches and cars manufacturers that dont recommend normal chains on higher rim sizes

Thank you so much!