P 225 /50R16 91S The 225 indicates this tire is 225 millimeters across from the widest point of its outer sidewall to the widest point of its inner sidewall when mounted and measured on a specified width wheel. P225/ 50 R16 91S The 50 indicates that this tire size's sidewall height (from rim to tread) is 50% of its section width.
The date and location of the tire’s manufacturing, among other things, too. It’s birth certificate, essentially. Often, other important symbols can be found on your tire’s sidewall.
Related posts to what do the numbers on a tire mean
Aspect ratio of sidewall Example P225 45 R17 91V The two digit number that usually follows the tire’s section width tells us the aspect ratio, or tire profile measurement. In this example, the 45 indicates that the sidewall distance, from the wheel rim to the outside of the tread, is 45 of the section width..
Height of the Tire’s Sidewall. The two digit number following the slash in the tire size description is the tire’s aspect ratio. It is the sidewall height expressed as a percentage of the tire’s width. If the markings say 255 55R18, it means that the height of the sidewall is 255 multiplied by .55, or 140 millimeters..
225 identifies the tire section width, which is the measurement of the tire from sidewall to sidewall in millimeters. This measurement varies depending on the rim to which it is fitted. There are 25.4 millimeters per 1 inch. 50 is the two figure aspect ratio..
65 Aspect Ratio. This number is the tire’s aspect ratio, or its section height compared to its section width. In this example, the section or sidewall height is 65 percent of the section width. This number can be indicative of a tire’s purpose..