jplante4 wrote:
...... Any Goodyear engineers out there?
Not Goodyear, but one of their competitors.
If you can find Tireman9, he was also a tire engineer for a third company. I can vouch for his expertise.
This has been discussed in intra-company committees for many years. Everyone on these committees agrees that properly stored tires last a long time. Yes, they have data.
Most tire manufacturers have set a limit of 6 years. The one I worked for used 3 years for their internal purposes - that way, they could point to the retailer as the sources of related problems.
And, yes, there are plenty of wholesalers and retailers who do a pretty bad job of this. Tires stored in sealed containers in the desert sun.
On the other hand, there isn't any data that directly ties tire age with tire failures. Too many variables.