The coaster brake arm is the lever that you push down on to activate the coaster brake, which is a type of brake found on many bicycles, especially children's bikes.
How the Coaster Brake Arm Works:
- The coaster brake arm is connected to a mechanism inside the rear hub.
- When you push down on the arm, it engages a series of gears and rollers that create friction against the hub, slowing down the wheel.
- This friction converts kinetic energy into heat, which dissipates into the air.
- The harder you push down on the arm, the more friction is applied and the faster the bike will stop.
Benefits of a Coaster Brake:
- Simplicity: Coaster brakes are easy to use, especially for children and beginners.
- No Handlebars Needed: You can brake without taking your hands off the handlebars, improving control.
- Automatic Engagement: The brake engages automatically when you stop pedaling backwards.
Example of Use:
Imagine you're riding a bike down a hill and need to slow down. Instead of reaching for hand brakes, you simply stop pedaling and push down on the coaster brake arm. This will slow the bike down and eventually bring it to a stop.
