You can usually find replacement brake pads by searching for the model of brakes installed on your bike. Ensure the pads are the same shape as the ones you are replacing. If not, that is a good sign that they are not compatible. If you are unsure, visiting your local bike shop may be best!

Most of our bikes have dual or quad-piston brake designs. This means that 2-4 cylinders in each brake caliper push the pads together. Knowing which type you have is critical to getting the correct replacement pads. To simplify things, we have created a chart below that has the correct pads for each model, along with replacement rotors.2-4 cylinders are 

How To Tell When Brakes Need Replacement

Unlike brakes in cars, bicycle brakes do not have auditory queues built into them to help riders determine when the pads and rotors need to be changed. Direct measurement is often the best way to know; however, many experienced mechanics can often tell just by glancing. The following two images go over what to look for for both pads and rotors to determine if they are worn out. ,

Pad Types

• The original replacement pads are going to offer standard levels of performance. 
• The pads listed in the quieter column will be an organic compound that will grab quicker with more initial braking bite, perform quieter under adverse conditions, and wear out faster. 

It is up to each rider to decide which traits they value in a brake pad and rotor. 

Please verify by searching the brake brand and model on your personal bike. Verifying the shape is also essential. 

**Due to generational changes, the chart below may not be accurate for your bike.

This video from Park Tool explains it very well and may be more than you ever needed to know about brake pads. It will show you how to replace them and discuss the different materials available.

Please also see this related article: Brake Rotor Replacement.