Age of "new" tires

Just a little food for thought. Everybody talks about how bad the rubber is. Question, how many rubber plantations do you think are located in the USA ?
None. Never has been. Those trees won't grow in our climate.
The rubber plantations were originally in Brazil, the Amazon region, then smuggled out of the country and eventually to Malaysia. Now Thailand, Asia, Indonesia produce most of the worlds natural rubber supply. It is a tropical plant. It has always been an import product and is refined here.