I hit some road hazard and one tire blew out. The dealer recommends changing all four tires. I know the manual recommends that, but my Ascent only has 9,000 miles on it, so the wear on the tires are pretty minimal. At the time, I refused and just replaced the one. After that, I've seen a few posts on the internet about how the tires have to exactly the same to each other, so I am little worried. Should I have replaced all four tires? Thank you so much for your help.