Originally Posted by Iride01

Replace them whenever you feel like it is appropriate. We don't know what your conditions, environment and traffic is where you ride. I can only suppose that a flat on a very busy congested road with some other mitigating factors might end up a disaster. But for me, I've never had a blowout or tire failure that was a problem or seemed like a potential harm to me. At most the tire feels a little squirrely as it gets low on air. But that lets you know to slow down because something is wrong. And I've also had blowouts that result in sudden loss of pressure too. None where a issue even when at speed.