Tire Tread/belt problems of the 2004 Toyota Highlander

Our SUV started seriously skidding on the road surface while driving, check the tread and found inside and outside of tires edges bald, and center of tire also poor tread. So for the safety of myself and family I had all 4 tires replaced.

During regular maintenance in my Toyota Highlander 4x4 2004 with a 20000 miles, the dealership inform me that the tires need to be replace and told me that warranty does not include tires. I strongly believe that tires should hold more then 15000 miles. The tires are bridgestone dueler h/t 687.

My vehicle is a 2004 Toyota Highlander. During the 15,000 mile service at the dealership, it was brought to my attention that all 4 tires were worn to the point of needing replacement. The service technician told me that the tires were wearing evenly and the tire pressure was at the reccommended pressure. During my inspection I could feel some slight cupping on the outside edge of the tires. The tires are toyo tranpath a11 size p225/70r16. The dealership is supposed to contact manufacturer to see what kind of assistance they can provide. This is very similar to odi number 10067341.