View Here : Tire Numbers Meaning
The tire size "P225/45R17 91V" may not mean much to the average person, but to tire geeks like us it speaks volumes. Read on to learn how to crack the tire code with this handy guide dedicated to tire types, sizes, and construction.
The two-digit number after the slash mark in a tire size is the aspect ratio. For example, in a size P215/65 R15 tire, the 65 means that the height is equal to 65% of the tire's width. The bigger the aspect ratio, the bigger the tire's sidewall will be.
Typically following the three digits identifying the tire's Section Width in millimeters is a two-digit number that identifies the tire's profile or aspect ratio. P225/ 50 R16 91S The 50 indicates that this tire size's sidewall height (from rim to tread) is 50% of its section width.
Tires made in the United States have the DOT serial number located on the inside sidewall near the rim. Below is a description of the serial number. Starting with the year 2000, four numbers are used for the Date of Manufacture, the first two numbers identify the week and the last two numbers identify the year of manufacture.
Tire numbers and letters on a sidewall contain information about the tire’s size, maximum speed and load, age, treadwear capacity, and much more. You can learn all these details from three main codes: size code, Department of Transportation (DOT) code, and Uniform Tire Quality Grading (UTQG).
UTQG Treadwear Numbers: What Do They Mean? Often, I receive calls about a tire's life and the tire's relationship to its assigned UTQG treadwear indicator. UTQG numbers are assigned to indicate a tires overall level of performance and tread hardness.
What do the numbers on this tire mean? Tire Width: 215/65 R15 “215” in this sequence refers to the tire’s width in millimeters. In other words, this tire is 215 millimeters wide, from sidewall to sidewall. Aspect Ratio: 215/65 R15 “65” in the sequence is the aspect ratio of the tire. The aspect ratio is a percentage, and it tells you ...
A tire's load index is a measurement of how much weight each tire is designed to support. The larger the number, the higher the load capacity. This is one of the most important numbers on your tire.