What is the purpose of bike cotter pins and how do they contribute to the functionality of a bicycle?

Answer 1

Bike cotter pins are small metal pins used to secure the crank arms to the bottom bracket axle of a bicycle. They play a crucial role in maintaining the connection between the crank arms and the axle, ensuring that the pedals can turn smoothly and efficiently. Without cotter pins, the crank arms could become loose or fall off, leading to a loss of power and control while riding. In essence, cotter pins help to keep the bike's drivetrain functioning properly and ensure a safe and smooth riding experience.