Ford

I purchased new a 2011 F150 Ford truck, I have 30K on the tiores that came, on the truck. They Are Pirelle Scorpion ATR 275/55/20 and they are cracked so bad i can not drive the truck because of safety concerns. At the time when i purchased the truck Pirelle had a problem with these tires and For should have not put these tires on new trucks. I have contacted Pirelle and they said to go back to the dealer and have them start a warenty claim on them. They told me at the dealer that the tires are out of warenty, and that they would not do anything about them. They told me that the tires are 6 yeras old and have to be replaced. That is a bunch of bull crap, ui have tires on a truck that i own that has 20 years on them and have no cracking on the side walls. I want Ford to do something about this matter, beacuse they put these tires on the truck new and should have known at the time that the tires had a problem. I have found way back in 2006 through 2012 that these tires had this problem and the people that had these trucks had them replaced at no charge. I want an answer on this mater so i can get my truck back on the road, and some good tires on it.
Allan