I have the 19" sport wheels with the x Continental ProContact RX 235/40. I will soon need new tires and I want to go to 18" wheels. I also want to get a small boost in height and was hoping to get 235/50R18. However, I can't seem to find any EV specific tires that size. I looked at Bridgestone Turanza EV, Hankook iON evo AS and Pirelli All Season Plus Elect. Why don't any of these come in 235/50R18? If I want my size I may have to choose between the Michelin Pilot Sport All Season 4 or CROSSCLIMATE2.