I was going through a pile of used tires to find one to temporarily put on the taurus until i can get the rack fixed. I found one tire off a GM product that looked OK from the outside with 60% tread or so.
I dismounted it to remount it on a Ford rim and found a surprise. There was a pile of fine shredded rubber inside the tire. ANd when i looked up to the under side of the tread, you could see the steel belts showing where the rubber flaked off .
What could cause such a tire failure? Never seen this before.
Bob