buying tires was getting expensive for me too. I switched to 18x8 front and 18x9 rear. Running 18's gave me access to a much bigger selection of tires that didn't cost as much. I am now running 235 40 18 up front and 265 40 18 in the rear. I just relplaced the rears with BFG Gforce KD's which I found for only 220 for the pair. I also added the KMAC kit and had the car aligned for maximum tire life. I hope I can now get over 5000 miles on the rear.