On Sunday, November 10, 2013 12:30:25 PM UTC-5, wrote:

I would say, it feels like a brake vibration, humm (with the brakes pads clear of the rim) like a rummble strip in a car going at highway speeds.

Weird. Could it have something to do with contact between spokes?

I wonder if sandwiching a bit of tape between each spoke crossing might stop the noise. Not that you'd like to leave those there, but if it cured the noise, it might suggest a subsequent step.

- Frank Krygowski