There are a couple of different indicators that will tell you have issues with your brakes. If you have worn our brake pads or shoes, you will notice poor braking performance combined with loud squeaky brakes, and grooved brake rotors. If you notice your brakes are squeaking, take a moment to look at the brake pads, If the material on your brake pad that makes contact with your brake disc is 1/8” thick or less, it’s probably a good time to change your brake pads. If you notice your brakes feel soft, or the pressure in the hand lever is fluctuating, or if your brakes are getting really hot and your notice the brakes are dragging when they are not being applied, you may have dirty fluid, a bad caliper, or a reservoir that needs to be rebuilt.