Lets assume the rotors and pads are fine.
I would then think you might have to check the lower arms, joint and bushes (is that how you spell it, coz thats how I would pronounce it).
I suspect could be the lower arm or the rod thats needs to be checked.
Then again, perhaps you hit something or went through a huge potbelly .. ops.. pothole and knocked something in the front undercarraige?
126 tailed by a 203, 129 leading the pack.