[Richard]

Gee this is very weird, when I look again, I see something I didn't see the first time. If you look carefully at the smooth section of the tire close to either edge you can plainly see the tiny sipes cut into the last tread block on either side of the tire. The rubber around that section looks like what a normal tire should look like. On second look, it is almost like the tire was rolled into gummy rubber that stuck to the tread. And that gummy stuff kind of eroded away. I have no idea what would cause this.

Clint, the story about the tire history is hard for me to sort out. So let's stick with these tires for sec. These are tag and steer tires put on at the same time. How many miles did they have on them? How old? How long did it take for this condition to develop?

Are the drive tires the same brand and age? What to they look like?