A fixed gear bike, often called a fixie, is a type of bicycle that has a single gear and no freewheel mechanism. This means that the pedals are always in motion when the bike is moving, allowing the rider to control speed and braking by pedaling backward. Fixed gear bikes are popular for their simplicity, lightweight design, and minimal maintenance requirements. These bikes are commonly used in urban environments and by track cyclists for racing. Riders appreciate the direct connection between the bike and the rider, which can enhance the cycling experience. However, they require a different riding technique, as stopping involves slowing down the pedals rather than using hand brakes.