So my wifes car has the OEM tires with 45k. The tires have lasted a long time for OEM but I'm thinking of replacing with Goodyear comfortred touring. Anyone have experiance with these? I also don't know if I should push these tires till they are bald or just switch now? Since its my wifes car and we are driving to Nebraska for thanksgiving I think I'll change them this weekend. Do you guys push till bald or at what tred depth do you change?