Message #19642

[epic]

So it sounds like you have 74mm post mount then. Assuming everything is cleanish, you're gonna want to make sure the brakes are centered. You probably have one pad just touching the rotor. Can I assume the brakes are Shimano? Anyway, loosen those two bolts, jiggle the caliper around to make sure it is loose, then squeeze the brake lever. While holding the brake lever, tighten those bolts back up. Do it gently so that the caliper doesn't move while you are turning them (sometimes it tries to walk as you turn the bolts). Hopefully, you now have the same amount of space between the rotor and the pads on both sides. If not, and you still have some squealing, you can try to fudge the caliper over a little bit while the bolts are loose.