Advocate I
I edited my post above, both the 3W and 4W have full depth sipes.Mine seem to be wearing fast, and since they are not siped through the entire tread, the winter traction has diminished somewhat. I think the AT4W is siped the entire tread so that should help alot with the winter grip. As for wear, I am going to the dealer and having a treadwear test done.they were and continue to be the best all-around tire I've run. Quite, capable, great wear, ride and handle really well. Glad to hear you're happy with them!
I am buying them again, but it will be the at4w this time.