Bicycle customization involves modifying a bike to better suit an individual's preferences and riding style. This can include changing components like the saddle, handlebars, or wheels to enhance comfort and performance. Customization can also extend to aesthetics, such as painting or adding decals to make the bike unique. Many cyclists choose to customize their bicycles for various reasons, including improved functionality, personal expression, or to accommodate specific riding conditions. Popular upgrades may involve installing lights, fenders, or gear systems to enhance safety and versatility. Overall, customization allows riders to create a bike that reflects their personality and meets their needs.