Greetings to all.

Currently, I use "native" wheels (if I'm not wrong, it's 5.5Jx15 4/114.3 ET46 d67.1) and 195/55/R15 tires, but my wheels have already run almost 200 thousand of kilometres, they feel pretty tired, so I'm considering buying the new ones.

The trouble is that I can't find exactly these sizes of disks anywhere in my country. I understand that 4/114.3 and d67.1 are the parameters from which I will not run away, it's also recommended to stick to ET46 if I wouldn't like to be surprised on the road, but other parameters could be flexible. Can I set, for example, 5.5Jx14 or 6Jx16? Will there be any problems with that? And what tires would you recommend for these "alternative" discs?

Thanks in advance!