After waiting over a month for an �lbs� (i live in rural Texas and it�s a two hour drive) to do some maintenance including replacing brakes and a tuneup i decided to learn to fix more problems at home.
Different rotors from different brands have micrometer differences but it�s enough to run and squeak if you don�t reset the pads. I tried using credit card shims , moving the pad mounts, but nothing was 100% effective. A friend said they had the same issue and the lbs they used told them but the park tool. He said it worked wonders so i bought my own. First try NO SQUEAK!
Have used it on my other bikes and it is the most consistent fix for rubs I�ve encountered. If your rotor has warping issues it won�t fix that, you may need a truing tool if it�s even fixable.
A cheap addition to your workplace that can save you headaches and cash when pads and rotors last longer.