I too would be okay for 6 months. I look hard at my tires at 5 years and aim for full replacement at 7. Likely start swapping one each time inspected at year 5 so I don't get a killer 2K bill all at once. I just got a road hazard flat after rolling over what looks like a huge nail, maybe a spike of sorts. 2.5 years old from date of purchase, with 1670 miles on them. Awaiting claim decision on reimbursement. You need read that in another thread. It was quite an ordeal. Corporate is working it for me now. But talk about disconnects on a routine situation.