A bicycle is a human-powered, single-track vehicle with two wheels attached to a frame, one behind the other. It is also known as a pedal bike, pushbike or cycle. People who ride bikes are called cyclists. Bicycles are used in many sports and forms of transportation, and have spawned numerous related industries and subcultures. The most important part of a bicycle is the frame, which supports the weight of the rider and holds the cranks, chain and other components. The bicycle frame is usually made from steel or aluminum, though titanium and carbon are becoming increasingly popular.

The first bicycles, which were called velocipede de pedale or dandy horses, were developed in the early 1800s. The earliest version, invented by German nobleman Karl von Drais, was a clunky wooden beam with no pedals or tires and a mechanism for propulsion that involved using a lever to push off the ground.

During the next few decades, engineers made significant improvements to bicycles. The cranks were moved from the axle to the frame, and the front wheel was lowered, making them easier to balance. The chain drive was added, and the modern bicycle became more streamlined and efficient.

Most people use their bikes to get around, but they are also a common mode of transport for racing and exercise. Almost 100 million bikes are produced every year, and they are used on all of the world’s continents. Bicycles are a critical component of the global economy, providing jobs in manufacturing and agriculture, and conferring benefits on other industries such as industrial design, health and social policy.

In the late 19th and early 20th centuries, manufacturers developed specialized bicycles to suit particular markets. For example, racing bicycles have a rigid frame and thin tires for maximum speed. Commuter and recreational bicycles are designed to be comfortable for long rides and can accommodate racks, fenders, and other accessories for practicality.

As a result, there are several types of bicycles on the market, from lightweight and high-performance road bikes to mountain bikes that can handle rugged terrain. There are also hybrids that are designed to be versatile and commuter bikes that can withstand the rigors of everyday riding.

To choose the best bike for you, consider the type of riding you plan to do and where you will be doing it. Then, think about your body and comfort level. The right bike can make all the difference in your biking experience.

To begin, you should find a good spot to stand on your bike. Position your feet so that your right foot is on the bottom of the pedal, and the left is on top. Then, bend down on the bike and keep your core tight as you shift your weight forward over the seat and handlebars. The movement should feel natural and effortless, like you are gliding over the surface of a smooth road. When you are seated in the saddle, your legs should be straight out in front of you with your knees slightly bent. This allows you to easily reach the hand holds while maintaining your balance and static control.