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The stem of a city bike is an essential part that connects the handlebars to the steering pivot of the frame. Here is a description of its function and characteristics:

Function :

The stem performs several crucial functions for the operation of the city bike:

1. Handlebar attachment:

The stem attaches the handlebars to the steering pivot of the frame, allowing the rider to steer the bike by turning the handlebars.

2. Handlebar Height Adjustment:

The stem can be adjusted to change the height of the handlebars in relation to the bike frame. This allows the rider to adjust their riding position for optimal comfort.

3. Cable routing:

In some cases, the stem can also be used to route brake and gear cables along the bike frame in a clean and organized manner.

Features :

1. Length:

The length of the stem determines the distance between the steering pivot and the center of the handlebars. A longer stem allows for a more stretched rider positioning, promoting a more aerodynamic riding position. A shorter stem, on the other hand, offers a higher and more comfortable position.

2. Angle:

The stem can have a positive, zero or negative angle relative to the vertical. A positive angle raises the handlebars toward the rider, while a negative angle lowers them. Some stem models also offer variable angle adjustment to allow the rider to customize their riding position.

3. Material:

City bike stems are generally made of aluminum, steel or carbon. Aluminum is the most commonly used material due to its light weight, strength and durability. Carbon stems are lighter and offer better vibration absorption, but they can be more expensive.

4. Swivel diameter:

It is important to choose a stem whose pivot diameter matches that of the frame's steering pivot. Standard pivot diameters for city bikes are typically 1 inch (25.4 mm) or 1 1/8 inch (28.6 mm), although other sizes may also be available depending on the type of bike .

5. Design:

City bike stems come in a variety of designs and finishes to match the aesthetic style of the bike. Some models may have a traditional, classic design, while others may have a more modern, streamlined look.

In summary, the stem of a city bike is an essential component that allows you to attach the handlebars to the frame and adjust the cyclist's riding position. By choosing a stem with the right length, angle and material specifications, riders can customize their riding position for optimal comfort on their city bike.