If you're not driving like a hooligan, you should get 10-13000 miles a set. The outside of the fronts will "look" worn, but they're fine (generally) as long as the first deep tread is above the "wear bars" embedded in there. If you feel down the groove of the first major tread and hit a "bump" in the tread every so often, those are the wear bars. As long as those bars are below the level of the tire, you have life.
It is important to keep them filled with air religiously if you want them to make it to 13K. You're resting 5200 lbs on these tires. And, having one tire low on pressure can cause drift in my experience.
Last edited by JCMorrill; 04-06-2017 at 12:59 AM.