How to Change Shimano Disc Brake Pads BR M485

Written by clayton guebert
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How to Change Shimano Disc Brake Pads BR M485
If you want to ride in snowy conditions like this, it's best to change your brake pads regularly. (cycling image by Imre Forgo from

Similar to chains and cables, disc brakes pads are a wear item on a bicycle. This means they eventually wear out. But as any mountain biker knows, Shimano's disc brake system is excellent in terms of reliability and stopping power. The key to keeping it working properly is to keep an eye on your brake pads and change them when they wear out. Otherwise, your braking will suffer and your ride simply won't be as much fun.

Skill level:

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Things you need

  • Needle nose pliers
  • Flathead screwdriver
  • New Shimano BR M485 Disc Brake Pads
  • Allen wrench

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  1. 1

    Remove your old disc brake pads. Remove your wheel and insert your flathead screwdriver into the caliper, rocking it back and forth to push each brake pad all the way back into the caliper. Use your needle nose pliers to flatten the ends of the pin that goes through the top of the brake pads. Then pull the pin out. Next, reach into the top of the brake caliper, which holds the pads over the disc rotor, and pull out the pads and the retainer spring in between the two pads.

  2. 2

    Insert the new pads into the caliper. Align the pads around the edge of the retainer spring and insert them into the calipers as a unit. If you do it properly, they should slide evenly into the caliper. Then insert the new retainer pin that comes with the brake pads through the top of the pads and the hole on the retainer spring. Bend the end of the pin with your needle nose pliers so it will not back out unexpectedly.

  3. 3

    Put the wheel back onto the bike. Pick the bike off the ground and give the wheel a spin. While the wheel is spinning, squeeze the brake lever repeatedly until the pads contact the rotor and the brake feels normal. Squeeze the brake repeatedly until the wheel stops spinning.

Tips and warnings

  • If the rotor rubs on the pads, use an Allen wrench to loosen the caliper then spin the wheel and stop it by holding the brake. Tighten the caliper back down. This usually adjusts the caliper, but may take multiple attempts. If this doesn't work, your rotor may be bent, which will require a trip to your local bike shop.

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