[masraum]

Originally Posted by notfarnow

+1

My guess is something cut into it. I wonder if there's tire "dust" all around the inner fender. I had a the front muffler changed on a Renault, and they had the pipe clamp turned to the bolt end was pointed towards the tire. Worked fine for ages until I went to pull a REALLY sharp u-turn and the clamp cut into the tire.

Yeah, a cut from rubbing. Running on an severely underinflated tire can cause similar symptoms including a groove worn in the sidewall, but there would be more rubbing on the sidewall itself. It's hard to say since the visible rubbing in the picture could have been post blow out.

What's the other side of the tire look like?