How to remove the pedal crank from a mountain bike?

To remove the pedal crank from a mountain bike, you will need a pedal wrench or hex key. First, loosen the pedal by turning it counterclockwise. Then, use the wrench to remove the bolt holding the crank arm in place. Once the bolt is removed, gently tap the crank arm with a rubber mallet to release it from the bike frame. Repeat the process for the other side of the bike.