Uniroyal  and Goodrich merged to prevent a hostile takeover by Goodyear, then Michelin = bought them anyway.  This was over ten years ago.   Continental = bought General, Pirelli bought Armstrong, Bridgestone bought Firestone, and = Yokohama bought Mohawk.  Sumitomo bought Dunlop and Cooper, = and now has a "joint venture" with Goodyear.  There really are no American tire  technologies left, but Goodyear, and  how long with = they last.  In reality Michelin  taught the others how to make = tires, in today's world.
  This gave those companies manufacturing capacity here. Michelin then built a = plant in Greenville, SC and it  runs most Michelins sold in the = US.   The  rubber plantations  are all in the tropics, rubber is a = raw material  that is shipped all over the world.  There is no = difference in the rubber per se,  the difference is in the technology.  = Don't think you must have a tire made in France to get a good one. 
 Jeff/Florida