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Cassette and chain for electric, city and kid bike used and new

The cassette of a city bike is part of the transmission system and is located on the rear wheel. Here is a description of its function and main characteristics:

1. Shift function:

The cassette is made up of several cogs of varying size which are mounted on the rear wheel hub. These sprockets allow you to change gears by moving the chain between them using the rear derailleur, which changes the pedaling resistance.

2. Number of speeds:

Cassettes can have different numbers of gears, from a few gears to a wide range of gears, depending on the bike's drivetrain system. City bikes can usually have cassettes with a number of gears suitable for urban use, providing a range of gear ratios to suit the different terrains encountered in the city.

3. Compatibility:

It is important to choose a cassette compatible with the bicycle's transmission system, particularly with the type of rear derailleur and the number of speeds. Cassettes are generally designed to be compatible with different types of drivetrains, such as 7, 8, 9, 10, 11 or even 12 speed drivetrains.

4. Materials:

Cassettes are typically made from steel, aluminum, or titanium, with individual sprockets often made from steel for added durability. The materials used affect the weight of the cassette as well as its durability and resistance to wear.

5. Speed ​​staging:

Cassettes are designed with a specific spacing between cogs, meaning each cog is a slightly different size to provide a smooth progression of gear ratios. Proper gear ratios allow for smoother and more precise gear changes.

6. Fixing:

Cassettes are attached to the rear wheel hub using a cassette nut or lock nut. They are designed to be easily assembled and disassembled when replacement or maintenance is necessary.

In summary, the cassette of a city bike is an essential component of the transmission which allows you to change speeds by moving the chain between the different sprockets. It is designed to be compatible with the bike's transmission system, offer smooth progression of gear ratios and resist wear for daily use in urban environments.