I've had my 2008 335ci Sport for 1 year. So far I've had to replace 4 tires because of bubbles from hitting potholes. Right now there are multiple bubbles on 3 of my tires, so I'll be needing to replace them very soon. I just drive on normal road and hit the occassional pothole, but with these tires every bump is bone jarring, and it seems like 2 pothole hits = 1 new tire. I drive over the same bumps in my Honda and barely feel them, nevermind blow a tire. I'm going to replace the tires, and I'm going to non run flats in the hopes of getting them to last. Should I also switch to 17" wheels to be safer, or will the switch to non run flats make enough of a difference for me? I've gotten a lot of different feedback but there doesn't seem to be any consensus. Thoughts?