My Dunlap front tire has only 7k miles and I noticed when I inserted a penny in the groove in the middle of the tire, Lincoln’s head was close to or out of the groove. There appears to be wear bars and those are almost even with the groove. That means the tire is about done. But can I safely get a few more miles, not long rides, just local. I have a new Avon Chrome coming, but I have an itch to ride. Gerald