The term "27.5 inch" typically refers to the diameter of a bicycle wheel, which is a common size used in mountain biking. This size is also known as 650B and offers a balance between the agility of smaller wheels and the stability of larger ones. It provides a good compromise for riders looking for versatility on various terrains. In addition to bicycles, "27.5 inch" can also describe the size of certain television screens and monitors. This measurement indicates the diagonal length of the display, which affects the viewing experience. Larger screens can enhance immersion, making them popular for gaming and watching movies.