bici

Bici is a common informal term for bicycle, especially in Spanish- and Italian-speaking regions. A bicycle is a two-wheeled vehicle powered by pedaling, with a frame, handlebars, saddle, chain drive, and brakes. It is used for transportation, recreation, and sport.

The modern bicycle originated in the 19th century, evolving from early pedal-powered velocipedes to the safety bicycle with a chain drive and equal-sized wheels. Subsequent advances—improved tires, gearing, and lighter materials—led to the wide range of designs seen today.

Design and components include a frame made from steel, aluminum, or carbon fiber; two wheels with tires; a drivetrain that transfers pedaling power via crankset, chain, and gears; steering through handlebars; and braking systems such as rim or disc brakes. Some models include suspension to absorb shocks from rough surfaces.

Types include road bikes optimized for speed on pavement, mountain bikes designed for off-road terrain, hybrid or commuter bikes for everyday use, and electric bicycles that provide pedal-assist through motors located in the hub or near the crank.

Bikes play a major role in transportation, sport, and recreation. They offer low operating costs and reduce greenhouse gas emissions when replacing car trips, while supporting urban mobility and public health. Safety practices include using lights, wearing helmets where required, and obeying traffic rules.

Maintenance essentials include regular tire pressure checks, chain lubrication, brake inspection and adjustment, and periodic professional tune-ups. Proper storage, cleaning, and routine checks help extend component life and ensure reliable performance.