I have 4 used RE-92 tires, which will be coming off my insight sometime this week. The edges are bald, but the center has a little bit of thread left. I don't see any metal or bubbling in the rubber. With that said if anyone needs them for an experiment let me know. I'll give them to costco to recycle if no one wants them by the ... 31st of may
Keep chugging along insighters...