Fixed-gear bicycle

A fixed-gear bicycle is a special kind of bike that only has one speed and doesn't have any gears to change. It works by having the pedals connected directly to the wheel, which means that whenever you pedal, the wheel spins too. This also means that when you stop pedaling, the wheel stops too.

When you ride a fixed-gear bike, you have to keep pedaling all the time, even when going downhill or slowing down. This makes it really important to be a good rider and know how to control your speed and balance.

Fixed-gear bikes are often used by bike messengers or people who ride bikes for fun and sport. They are also popular for track racing because they are lightweight and easy to maneuver.

Some people like fixed-gear bikes because they feel more connected to the bike and have more control over their speed and movements. However, they can also be dangerous if not ridden properly, so it's important to always wear a helmet and practice safe riding habits.