I've been scratching my head on this one for a while finally addressing it. My car has had a slight wobble upon initial braking pretty much since I bought it, never gotten worse. It starts under initial braking and as you increase braking pressure it goes away. I've just replaced pads and rotors all around. Just did front hubs both sides ball joints and tie rod ends a seem good. New rims and tires as well. I'm starting to wonder if I have a sluggish front caliper and its not pinching the pad square.....thoughts?