I recently put 245/40/18 tires on 8" wide aftermarket wheels and they fit like a glove. The OEM height is 25.9" and with these tires the height was 25.7" which is very close. So, you probably want to stick with 40 aspect ratio, not 45 since the tires are wider. Also, if the OEM sport wheels are only 7.5" wide, you probably can't go wider than 235 or you are really stretching the tires to fit. But, you could consult your local tire/wheel dealer as well. Hope this helps. I attached a photo of the wheels I put on my car and I have the Sport, AWD, Candy Red Metallic.