After it was about half worn, my original rear Metzeler ME880 started to howl when leaned over. The howling got louder the more the tire wore. It stopped when I fitted the Exedra Max rear.
As a side note, the Exedra produces a noiseless thrumming vibration running straight up, but only in 4th gear. Like someone thrumming his fingers on the table. I am not concerned, because exactly the same thing happened after fitting a rear Avon Azaro to a BMW R1100RS. That bike would "thrum" in 2nd and 4th gears, not in the other gears. Nothing wrong with the bike, just some kind of harmonic sympathy due to the tread pattern.