Coaster brakes, also known as drum brakes, are a common type of braking system found on bicycles. They work by using friction to slow down the rear wheel. Here's how it works:
The Mechanism
- The Brake Lever: When you squeeze the brake lever, a cable connected to the lever pulls on a brake arm.
- The Brake Arm: The brake arm pushes a brake shoe against the brake drum, which is attached to the rear wheel hub.
- Friction: The pressure of the brake shoe against the brake drum creates friction, which slows down the rotation of the wheel.
- Stopping Power: The harder you squeeze the brake lever, the more pressure the brake shoe exerts on the drum, resulting in stronger braking force.
Advantages of Coaster Brakes
- Simplicity: Coaster brakes are relatively simple to operate and maintain, making them a popular choice for casual riders.
- Easy to Use: They are activated by pedaling backward, which makes them intuitive for beginners.
- Low Maintenance: Coaster brakes require minimal maintenance, typically just occasional lubrication.
Disadvantages of Coaster Brakes
- Limited Stopping Power: Coaster brakes generally have less stopping power than other types of brakes, such as disc brakes or rim brakes.
- Not Ideal for Aggressive Riding: They are not suitable for downhill riding or other demanding situations.
- Can Be Noisy: Coaster brakes can sometimes make a clicking or grinding noise, especially when they are worn.
Conclusion
Coaster brakes are a reliable and simple option for casual riders, but they have limitations in terms of stopping power and suitability for aggressive riding.
