Originally Posted by MrFatbooty
I'm just speculating here, but maybe by over-torquing the lugs the hub becomes messed up such that the rotor does not stay lined up with the caliper and under braking sort of moves side-to-side in between the pads, thus causing the vibration.
Thats kinda what I was thinking... I was just trying to say its not the rotor surface that is wapred but the hub itself, and I am sure that would cause vibration.