18" wheels

Mu concerns are cost (18s are pricey), and having room for sidewall on an A with the short tires.

Totally get it. As long as you stay under 26” for the overall tire height and don’t run more than 5.7” of backspace or so a 17x8 will work and shouldn’t hit the UCA at full steering lock and suspend droop. 245’s should clear with 73+ brakes if you run around 5.25” to 5.7” of backspace