Fixie bikes, also known as fixed-gear bikes, are bicycles with a single gear ratio and no freewheel mechanism. This means that the pedals are directly connected to the rear wheel, so the rider must pedal continuously to keep the bike moving. Fixie bikes are popular among urban cyclists because they are simple, durable, and efficient.
Fixie bikes offer several benefits over traditional geared bikes. First, they are more efficient because there is no energy lost through the freewheel mechanism. Second, they are more durable because there are fewer moving parts to wear out. Third, they are simpler to maintain because there is no need to adjust gears or replace cables. Finally, fixie bikes can be ridden in any weather condition, as they are not affected by mud or snow.