I had 4 brand new Dynapro ATM P265/75R16 114T installed on my 2003 Tacoma. As soon as I left the shop I could hear a loud vibration, I went back to the shop and was given every excuse, including it was a mechanical problem. After paying to have checked out by my mechanic I was given a clean bill of health for my truck, and told it was a tire problem. Note. My truck did not make the noise or have the problem until I had the tires put on. I have heard every excuse as to why it's not their problem, to it will go away eventually. I have been told by other tire shops that it is a tread problem and has potential for disaster. I will never purchase a Hankook product again.