bicycle

A bicycle, commonly known as a bike, is a human-powered vehicle with two wheels attached to a frame, one behind the other. It is designed for transportation, recreation, and sport, and is considered an efficient and environmentally friendly mode of travel. The basic components of a bicycle include the frame, handlebars, saddle (seat), pedals, chains, gears, and wheels. Most bicycles use a chain drive to transfer power from the pedals to the rear wheel, enabling movement.

Bicycles are classified into various types based on their design and functionality, including road bikes, mountain bikes, hybrid bikes, and touring bikes. Road bikes are optimized for swift travel on paved surfaces, featuring lightweight frames and narrow tires. Mountain bikes are built for rugged terrain, with sturdy frames and wider, knobbier tires for stability. Hybrids combine features of both, suitable for diverse conditions.

The history of the bicycle dates back to the early 19th century, with the invention of the velocipede and later the safety bicycle, which introduced chain drives and similar-sized wheels to improve stability and safety. Bicycles played a significant role in social mobility and urban development, especially in the late 19th and early 20th centuries.

The advantages of cycling include promoting physical health, reducing traffic congestion, lowering pollution, and decreasing the carbon footprint. Bicycle maintenance involves regular checks on tire pressure, brake function, and chain lubrication to ensure safety and optimal performance. As a popular and sustainable mode of transportation, bicycles continue to evolve with advancements in materials and technology, contributing to urban planning and environmental sustainability worldwide.