Good point to consider.Not to be a downer but most of us buy KIA for the warranty and changing up tire/rim size voids that warranty
From warranty manual under "what's not covered" - "Damage caused by installing incorrect tires(size etc) "
That one line will give KIA an out on just about anything that happens to drive train or suspension components.
I wouldn't change tire/rim sizes until I hit the 5 year 60K mile mark.
I know Costco will not install tires other than what the manufacturer specifies probably more to protect themselves from risk/liability, and expect many other tire fitment places have the same policy.
Insurance companies might also use it against you.