[thom4782]

Here's a question...does the frequency of the vibration increase as the speed of the car increases. Asking b/c as the rotational speed of the wheel increases the time between the peaks and valleys of a warped rotor passing by the brake pads should decrease thereby leading to an increase in the frequency of the vibration.

Just a guess on my part of how the physics of a warped rotor translates into the feel in the steering wheel. My experience with an unbalanced tire suggests things could be more complicated in that I've felt stronger vibrations at speed.