How do I get rid of weird rubbing noise on my cx bike?
What has probably happened is that when you used the brakes the wheel shifted slightly in the dropouts. The disk brake pads run really close to the rotor, so even a tiny shift can be enough to cause this problem. The solution is to open the front QR lever with the bike upright. As you do that you will probably hear a little "clink" as the wheel settle back into the dropouts. Then tighten the adjustment knob on the other end of the QR axle before closing the lever. More detail here and here with diagrams (and even an animated gif!) or in even more detail at Sheldon Brown's site

The design problem that causes this is serious, and is discussed by people like John Allen and my view is somewhat more forceful than his but otherwise compatible.

You can download the manual for your brakes from the Tektro site and use a 5mm allen key to adjust the fixed pad (the one closest to the spokes) and the barrel adjuster on the brake cable to adjust the other pad.



There are a few descriptions of how to adjust the brakes on this site like this one and on sites like Park Tool (who like to shuffle things round so that link will be broken in a few months)