Wheel Noise

[thstone]

Here's a long shot - check the parking brake. When I replaced my rear rotors the inner parking brake surface of the new rotor must have been a few thousands of an inch smaller which created a cyclical scuffing sound from the parking brake shoe dragging on the inside of the rotor. A minor parking brake adjustment eliminated the noise.

[crumbum]

Have you considered the tire itself? I had a tire that developed a delam and would create a "bubble" while driving (due to the heat on the tire). The bubble was not huge enough to see plainly, but running my hand over the tire found it.