Wanted to give '2 cents'. 2012 Denali bought new, has 36k mileage. Hockey trips planned and rental vehicles 5-6x's higher at least, decided just drive our own. They checked tread and asked why need, plenty safe tread left. Explained that these are OEM and 10 years old. I think those were Bridgestone Duehler's. Went to Goodyear Assurance Weatherready tires after researching all for months. Limited time on, so can't give full review after thousands of miles. Know they are #1 for snow traction as All Season tire. Not as high mileage warranty (60k) as others, but older they get they keep good traction. Of course with 255/55R20 size, knew when bought not cheap to replace.