Eventually when you get a couple of thousand miles on your bike, you'll find that you'll need to replace your brake pads. Take a look at this instructional video and learn how to replace your brake pads on your bicycle. Most brake pads have grooves cut into them, this allows you to see how far the pads have worn away. When the grooves are gone, it's time to replace them. When you're going through this process, pay particular attention to how the parts come off the bicycle.