Tire specifications refer to the detailed information about a tire's size, type, and performance characteristics. Common specifications include the tire's width, aspect ratio, and diameter, often expressed in a format like P215/65R15. This indicates a tire width of 215 mm, an aspect ratio of 65%, and a diameter of 15 inches. Additionally, tire specifications include load index and speed rating, which indicate how much weight a tire can support and the maximum speed it can safely handle. Other factors, such as tread pattern and rubber composition, also play a crucial role in determining a tire's performance in various conditions, such as wet or dry surfaces.