Wills7MGTE;1152274 said:
Thats an excellent video, it's amazing how they can do shit like that, when they are over 3 years of sitting they should require them to be melted and make new tires from that rubber
You can't just melt down vulcanized rubber and reuse it, if it were that simple, we'd have done it
Wow, you blew chunks of tread off two tires at the same time? You are one lucky dude, if nothing bad happened as a result!
I guess my only comment of any real substance is to ask what the heat rating of said tires were? Almost any tire you can buy to fit an 18" rim is probably going to have a decently high heat rating, and to get it to deteriorate at normal highway driving conditions would require you to run it REALLY low on air. Not just -5psi, I mean like... 25% or more low. But to lose two at the same time, and to have several do it over any period of time is nuts. Crazyness!
I've found that tires lose about 1-2psi (depending on tire size) per month at rest, and about 1psi or less per month when being driven regularly. If your tires are at 32psi, it'd take atleast 4-6 months of regular driving to get a serious low pressure condition.
If you still have the carcasses, check the DOT number for the date, as in the link Figit posted.
Other than that, if you can't trust your tires, you can't trust shit all. Almost anything else on the car could catastrophically fail and you'd stand a decent chance of surviving the following chaos... but a single tire failure can be fatal.