Changed all brake pads and rotors almost two weeks ago. Passenger side rear has a small rubbing issue when rolling at low speed. Rotor is not warped. I took the wheel off this morning to check it. If I hold the rotor flush against the hub, it doesn't rub the caliper (while spinning it). Rim is mounted flush as well. I don't get it.

The top inner edge of the rotor slightly rubs against the inner area of the caliper where it forms around the rotor. Barely any clearance (same as other side). Stumps me, because it only happens when I roll at a low speed (5-10mph). Once I brake it stops. As a side note I did check all pistons and greased em up. So nothing is frozen and stuck. This problem arose just 2 days ago.

 

Bearing. It's the only thing that can move independently in that area of the car if everything else is tight. You would only notice it when it's under load as well.

 

Yes correct, only under load. I figured something must be tilting the rotor. Damn it, another part I have to replace.