I changed a few tire sizes these few years, here is what I come up with. The max you can put on the front is 235/50/R18 and the rear is 255/55/R18 or 245/45R19. I had ordered a 235/50R19 for the front, but I not sure it will going to fit or not. I will update later on. I hope this could help some of you guys out.