I have had these tires for less than two years (31,000 miles). The tires need to be replaced due to wear. I did contact the Toyo tire company to inquire about their warranty. I was told that the tires have met their expectation! At 31,000 miles of use. These tires came on my new car, but I will not be buying these tires as replacements.
This is my second set. 1st set was on my 2013 Highlander, and replaced the god awful Toyo A20s that were OEM. Put 40K on first set and kept them as backup for new vehicle. They still have 4/32 of tread left, with nice, even wear, so tread wear is OK. Best tire I have owned. Very impressed with handling on all surfaces, and they balance beautifully. Nearly the same performance on ice and snow as my old Toyo ice tires - sure footed. Hope they keep making them. New ones have 17k on them, with 80% tread remaining.
I have these tires on 2 Toyota Highlanders. The grip and handling are by far best out of all of the tires out there. Nokian R2's are probably equal to these tires. I do a lot of highway driving throughout Ontario in the winter and you have a lot confidence when driving through nasty conditions with ease with these Weathermaster WSC installed. Would I recommend these tires? Yes! Would I buy them again? Yes definitely!
I like the Dueler's ride and handling, but on the freeway tread noise is very loud. I need to wear earplugs when driving on the freeway. The tires are factory installed on my new '15 Toyota Highlander with 4000 miles of travel. I will check with my dealer and ask for an exchange of these tires.