Tire age
Very fitting that the only tire photo of a blown up tire is a BFG = basically friggin garbage!
fill them up to the max pressure for winter storage. 44 and 51 on many newer tires.
usually the heat buildup from freeway driving will make them come apart.
14” tires are plentiful with the online tires places, not so much at your local tire shop, they don't sell any so they don’t stock them.