After reading all this thread I think I have reason to be pissed at my dealer.
On my FXDSE2 I wore the first set (Front & rear) out at about 6500 miles. They were worn evenly with the rear cupped slightly and were down to 2/32" of an inch when they recommended I should replace them. They told me "Thats about all you get mileage-wise nowadays" I replaced them at my expense with another set of Dunlops then subsequently totaled the bike 300 miles later.
On the replacement bike (identical) I replaced the Dunlops at 8000 miles (with Metzlers) with serious cupping starting on the rear and about 2/32" left on the front. All this on a Dyna that is about 200lbs less than a Bagger?

I dont do burnouts and the roads are mostly blacktop/concrete.
Sounds like I need to ask for warranty on the tires I have went through???
What do you think???
Tim