A bicycle, also called a bicycle with cranks or a two-wheeler, is a human-powered, pedal-driven, land-based transportation device. It consists of a seat, pedals, gearing, wheels and brakes, all mounted on a frame. Pedal-powered vehicles have been around for a long time, but the modern bicycle has a number of unique features that distinguish it from other types of wheeled vehicles. The bicycle is popular for recreation, fitness, commuting, and delivery services. It is used by people of all ages and abilities, including children, adults, and the elderly.

The bicycle’s most distinctive feature is that it has one pedal and a crank connected to the rear wheel, allowing the rider to use their feet to power the vehicle. The first recorded use of the term “bicycle” was in 1868, to replace the earlier terms dandy horse, hobby horse, boneshaker, and velocipede de pedal. It is not known who invented the bicycle; it is likely that several individuals independently conceived and built similar machines over a period of years, and that the invention was not a sudden revelation, but a gradual evolution of existing technology.

Bicycles are commonly fitted with auxiliary features, such as baskets, racks, and carrier frames for transporting cargo or passengers. The auxiliary features can be attached either to the front or the rear of the bicycle. Parents often add rear-mounted child seats to the frame of the bicycle for transporting children. The bicycle can also be equipped with a hitch to tow a trailer for carrying a load or additional passengers.

Various bicycles are designed with different technical characteristics, movement specifications, formal specifications, and performance capabilities. Some of them are intended for specific uses, such as mountain bikes, which are designed to be ridden on rough roads and at high speeds. Others are designed to be ridden on city streets and to move around the office and home in light work tasks, such as going grocery shopping or delivering newspapers or packages.

It is important for all bicycle riders to be aware of the rules and responsibilities of the road. They should wear a bicycle helmet at all times, obey traffic laws and other street signs, be courteous to other road users, ride safely, and maintain their bicycle in good working condition.

The bicycle is an excellent form of exercise, and can help increase balance and coordination. It is also an effective way to reduce stress and burn calories, as well as improving cardiovascular health. To get the most out of your ride, make sure that you have a bike that fits your height and body size, and that it is in good working order. To ride safely, always be alert to other road users and stay within the speed limit. It is also important to wear clothing that will protect you from the elements, such as a rain jacket and reflective clothing. It is also a good idea to carry an emergency kit, such as a first aid kit and a spare tube.