Why are bikes wheels so thin?

Bicycle wheels are not necessarily thin. In fact, there is a wide variety of wheel widths available for different types of bicycles. However, some bicycles do have thin wheels, and there are a few reasons for this.

* Weight reduction: Thin wheels are lighter than wide wheels, which can be an important factor in racing and other performance-oriented cycling disciplines.

* Aerodynamics: Thin wheels can also be more aerodynamic than wide wheels, which can help cyclists to reduce drag and improve their speed.

* Rolling resistance: Thin wheels have less rolling resistance than wide wheels, which means that they require less energy to roll. This can be an important factor for long-distance cycling or for cyclists who are trying to conserve energy.

Of course, there are also some disadvantages to thin wheels. For example, they can be less comfortable to ride on than wide wheels, and they can be more prone to punctures. Ultimately, the best wheel width for a particular cyclist depends on their individual needs and preferences.