A 26-inch bicycle refers to a bike with wheels that have a diameter of 26 inches. This size is commonly found in mountain bikes and some hybrid models, making it suitable for various terrains. The larger wheel size provides better stability and can handle rough surfaces more effectively than smaller wheels. These bicycles are often favored by adult riders due to their balance of speed and control. The 26-inch wheels allow for a comfortable ride while navigating through trails or city streets. Additionally, many accessories and parts are available for this size, making it easy to customize and maintain.