Avid offers various lines of road and mountain bike disc brakes. The disc brake system includes a pair of brake pads housed inside a caliper. The caliper is attached to the side of the bicycle and surrounds part of the rotor, on the side of the wheel. Friction causes the pads to wear increasingly thin. Avid recommends replacing its pads once the total thickness of each pad is less than 3mm.
Open the axle release, on the left side of the wheel. Grab the top of the wheel and push it down to detach it from the bicycle. Set the wheel aside.
Locate the inboard adjuster knob on the side of the caliper facing the bicycle. Turn the inboard adjuster knob all the way counterclockwise.
Pinch the spreader clip protruding from the side of the caliper facing the rear of the bike. Pull the spreader clip away from the caliper.
Grab the end of the first pad and pull it from the caliper. Grab the end of the second pad and remove it from the caliper.
Insert the first pad through the slot in the front of the caliper. Each pad resembles a small paddle. The handle-shaped end of the pad should point away from the caliper.
Insert the second pad into the caliper. Once again, the handle-shaped end of the pad should point away from the caliper. The soft part of both pads should face one another inside the caliper.
Install the spreader clip through its opening in the rear of the caliper. The two prongs at one end of the spreader clip must go in first.
Reinstall the wheel on the bicycle. Twist the axle release lever clockwise to tighten, and close the lever to secure the wheel in place.
Take the bicycle for a short ride to break in the new pads. Apply the brakes frequently at first to scuff the surface of the pads for a better grip.