About 5,000 miles after I put the 275/30/19 Exclaim UHPs on the rear I had a major blowout at 80+ & had to put a new Exclaim on as a replacement.(hollow metal straw-like thing about 2 inches long punched a hole right thru the center of the tire) There is maybe 2-3 32nds difference between the 2 rears.....but I can't imagine the tread depth difference between the 2 could be causing the noise?? So one of them has 17,000 miles on it & the other has only done 12,000 miles.