In this article, I will show you how to properly understand information printed on your tire sidewall. This would be helpful, particularly when you need a replacement for your tire.
There are 3 main important sections on each tire sidewall, these include:
- Tire specs
- UTQG Code.
Let’s take the picture bellow as an example:
Let’s discuss all above components of the tire specs in details.
Thus, we can see from the picture, the thickness of that tire is 225 millimeters. (25.4 millimeters = 1 inch).
In the example, the number 97 indicates that the tire could carry 1609 pounds. In order to find out the exact weight that a certain tire can carry, please refer to the following table.
|Load index||lbs||Kg||Load index||lbs||Kg|
Speed ratings represented by letters from A (the lowest) to Y (The highest). The letter “V” means the maximum speed recommended is 149 miles per hour or 240 kilometers per hour.
Even though your tire can perform at this speed, you have to bear in mind that exceeding the lawful speed limit is not only illegal but also especially risky.
The following table gives information on speed ratings:
Department of transportation safety code (DOT)
The letters immerge after “DOT”(4B in the example), called the plant code, identify the tire’s maker and site of creation.
After that, you will see the two characters (08 in the example), indicating the tire size in a manufacturer’s internal code.
The next four characters (4DHR in the example) are also determined by the producer, showing brand characteristics of the tire.
The last four numbers (2910 in the example) give you information about produced date of your tire. The first two numbers are the manufactured week, while the others stand for manufactured year. For example, 2910 means the 29th week in the year 2010. By this way, it is easy to recognize when your tire was made.
The Uniform Quality Grading (UTQG), organized by the National Highway Safety Administration (NHTSA), is a way of tire classification. According to UTQG, there are three core components: