These tires have a very aggressive thread, which was why I got them for the back of my ATV. They have excellent traction in snow, even while plowing, I can't wait for spring to see how they do in my favorite mud holes. I had originally planned on getting another pair for the front later, but with these on the back, I don't think I need to. Since they were mounted for me, I can't attest to how easy or difficult they are to install, nor can verify their durability, because I haven't had them long enough to know how they hold up. Judging by their rugged appearance & construction, I have no doubts that they will be on my Grizzly 660 for a long time to come.