The size of agricultural tires usually follows certain standards, which include information such as tire width, aspect ratio, and rim diameter. For example, the tire model marking may be 215/70R15, where 215 represents the tire's section width (in mm), 70 is the aspect ratio (i.e. the ratio of the tire's sidewall height to the tire's section width), R indicates that the tire is a radial layer structure, and 15 is the outer diameter of the rim (in inches). In addition, agricultural tires may use specific patterns, such as double or multi-stripe types, which are suitable for tillage and short-distance field transportation operations. The structure of the tire may also include the number of cord layers in the crown and sidewalls, as well as information such as load capacity and standard air pressure.