I have no idea what you all are talking about. I've got it in my mind this is the part of the tire that has no wear on it. My other ride was getting a square tire, so I have been attempting to lean more in the corners. I went too far on my PCX that I grinded the center stand and that lifted the rear tire. Slid for about 4 feet before I reacted by pushing the bike up, and myself lower to get the tire down. I saw sparks in my mirrors. When that happened it felt like I had all the time in the world to understand what was going wrong, correct it, and admire the sparks all at the same time.
I pulled over, heart racing, looked at my scooter, patted myself on the back for not biting it. Rode home.