i found this on nitto's website....only certain sizes affected.....
http://www.nittotire.com/dura-grappler-recall/
http://www.nittotire.com/dura-grappler-recall/
Neighbor has had six Toyos develop tread separation in two years. All replaced under warranty. I recall several years ago that they were the best for long life. So far, the best for me has been Michelin. How things change!Thanks for sharing. Good for Nitto for admitting the problem. I remember that Bridgestone had a problem before and took them longer to act.