I went shopping for new tires, again. My 2008 Jeep Liberty (bought new in mid 2009) has been fantastic. I love it and will likely hold on to it for my grandson to drive when I buy a newer vehicle within the next year. Only a couple of minor things over the years, but the largest and most expensive so far has been tires! 2-4 years is the average life of tires on my Liberty. I have low mileage, with just a little over 70,000 miles. It is the sports model but I have never taken it off road or run the heck out of it. I have had the suspension checked and it's okay and I always get two opinions when the tire issue pops up. The consensus is always "Pitting" that occurs on the tires and no one seems to know what causes it. Each set of tires I have placed on the vehicle do this and I make sure to buy a different brand each time now to ensure it won't happen again, but it continues. Any suggestions?