Hey, lets dont be knocking the Metzlers.......lol. I have ridden them for 63000 miles so far, they make a humming noise at slower speeds, more so as they age, less with lower tire pressure. But to me its a hum, a noise not so much a vibration I feel, as the sipes edge out I think it is more pronounced. Cupping makes it louder.......got a new set waiting to go on......soon.