How prepared are you to change one, if it blows out on the road? If it would be an easy 10-15 minute replacement, you can push it IMO.Somewhat off topic: My boat trailer tires are still the ones that came with it, purchased in 1997. They still have plenty of tread, hold air, and show no weather cracking. I guess I'm running on borrowed time but I don't tow it any farther than 10-15 miles to and from the storage place twice a year and less than a mile to launch. Think I should replace them?