He passed away a year or so ago.

The more I ponder this tire thing the more I recall tires blowing out when left in the sun. The bike is just sitting there and Kablooey.....time to get out the tools.
I remember taking a break on a group ride and my brother gets up and moves his bike out of the sun just for this reason. We had seen other tires pop in the sun. I can remember him saying, "I don't want it happening to me".