I have a Shinko 777 that I've got about 7500 miles on. I've still got a little way before I'm down to the wear bars. I've got this weird spot worn on it. It's a little dimple for lack of better word. I guess it is about the size of a finger print or so. It's very uniformly shaped, no rough edges at all. The shape would be something like if you pushed your finger into a rubber sheet, how it would depress uniformly around your finger, rounded bottom, gradually sloped sides. I'd guess it to be about 1/8" deep. Hard to tell due to the contour of the depression and the tire. I'd guess it's located about 1/2 way between the center and the edge of the tread. Anyone have any ideas what would a spot like that?
I've got no issues with the tire other than that. I discovered the spot when inspecting the bike. I was going to take it out of town for a couple of days. I've been riding around on it in town like this for a little while. Just not sure if I should trust it.
Edit:
I did take a few pictures but it's hard to make the pictures look like much.