Thought I would throw this our for some input from others.
Our 200S has Kumho tires, and after 42K miles the wear amount is fair and even across all the tires, but they sing like an old donkey braying.
I mean loud constant tire noise. Been around vehicles long enough to know it's not wheel bearings, but tire noise.
Anybody else with these Kumho tires hearing excessive tire noise ? I think they have another 15K miles left in them, after which time I'll replace them with a set of Michelin's, but until then we have to turn up the radio !