Freewheel

Fahrradtechnik

The freewheel is a mechanism on the rear hub of a bicycle that allows the cyclist to rest the pedals in certain situations without the crank and thus the rear wheel turning. The freewheel helps make cycling more efficient and comfortable.

The freewheel consists of a pinion gear mounted on the rear hub and a freewheel clutch. This clutch allows the pinion gear to rotate with the hub in one direction (usually forward) while rotating freely in the other direction. This means that the pedals are only connected to the crank and pinion gear when the rider is pedaling and moving the bike forward.

Situations in which the freewheel is particularly useful are, for example, when riding downhill or when the bike is rolling faster than the rider's pedaling speed. In these moments, the rider can rest the pedals without the crank turning. This increases riding comfort and allows the cyclist to better concentrate on the stability and control of the bike.

The freewheel is now a standard component of almost all bicycles with derailleur gears .

What functions does the freewheel have?

Allows you to coast without pedaling: The most obvious benefit of freewheeling is that you can let your bike coast without having to pedal continuously. This is especially useful when you are going downhill or want to take a short break from pedaling.
Over-rotation protection: The freewheel prevents the pedals from rotating too quickly when you are going downhill. This protects you from possible injuries that could result from too fast pedal rotation.
Allows you to change gears while stationary: Modern bikes with freewheels allow you to change gears even when the bike is stationary. This makes it easier to start on inclines because you can select an easier gear in advance.

What should be considered when using a freewheel?

Regular maintenance: To ensure smooth operation and longevity, it is important to maintain the freewheel regularly. This includes cleaning dirt and lubricating the moving parts.
Bike compatibility: Not all freewheels are compatible with every bike model. Before buying, make sure the freewheel fits your bike type.
Choosing the right type: There are different types of freewheels that differ in how they work and how they perform. Consider what your requirements are for your freewheel to make the right choice.

Alternatives to freewheeling

Rigid hub: Provides a direct connection between pedaling and wheel movement without a freewheel mechanism. Ideal for purists and in track cycling.
Hub gears with coaster brake : Combines the functions of gears and brakes in one unit. Practical for city bikes and children's bikes.

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