Car drivers should know how to read car tire codes. The problem is by knowing the car tire code, you can estimate the time of change of car tires and the maximum weight that can be transported by the four-wheeled vehicle.

The Importance of Reading Car Tire Codes

Tires have a big role for vehicles, especially cars. Because it can be said that tires become a single component that is directly related to the road. All tires produced must have an alphanumeric code.
The code is usually listed on the surface of the outer side of the tire, with the scope of information including the size of the shape, size of pressure, year of production, rotation speed, maximum load, and the size of the rim.

This alphanumeric code description allows you to understand the types of tires. The reason is, each tire is made to adjust to the needs because it has a load endurance and different speed limits.
So, arguably knowing how to read car tire codes is a wise step in driving similar to when you take care of the tire so that it remains suitable for use.

How to Read Car Tire Codes


To facilitate you in understanding how to read car tire codes, CekAja will provide examples of tire specification codes, namely P165 / 78R16-80H. This code contains 7 important things that will be explained one by one, along with a complete review.

1. The letter P indicates the type of tire

At the beginning of the code there is the letter “P” or called prefix. This letter contains the meaning of the type of tire code on four-wheeled vehicles. But it needs to be underlined, not all types of tires use the letter P (passenger). Because there are more series of other codes in the prefix such as “T” (spare tire only), “LT” (specifically small or light trucks), and “ST” (specifically large trucks).

2. The front three digits as the tire thickness code

After the prefix, you will find three numbers at the beginning which then explain the tire thickness code. For example the P165 code, where the way to read the car tire code on this one directly focuses on the three numbers after the letter P, which shows the level of tire thickness when fitted with a rim.

3. The tire ratio is shown before the construction code

The next way to read a car’s tire code is to look at the tire ratio listed after the tire thickness code and before the construction code. For example, in the CekAja version of the car tire code P165 / 78R16-80H, which number 78 shows the percentage of tire height to tire thickness.

4. Tire construction code

The tire construction code shows the shape of the tire itself. This code is listed after the ratio code with the letter “R” or “D”. The symbol R is interpreted as a type of tire that is commonly used by cars with a circular construction. While the letter D is interpreted as the most biased tires used by trucks and semi-trailer trucks.

5. Code width of the rim diameter

In how to read the correct car tire code, you will also find out how wide the diameter of the rim used by the four-wheeled vehicle. This code is usually juxtaposed with the letters that become ratio symbols.
For example in code P165 / 78R16-80H, which number R16 describes the width of the rim diameter. The bigger the number, the greater the rim attached to the tire.

6. The load limit limit code before the speed rating

From the sample tire specification code, namely P165 / 78R16-80H there is the number 80 after the width of the rim diameter code and before the speed rating. This figure is a reference to the load limit that can be supported by each tire.

7. Speed ​​rating or maximum speed code

The last way to read a car tire code is to look at its speed rating or maximum speed. This code is generally symbolized by the letters found at the end of the car tire specification code.
With the speed rating code, the driver can find out what the maximum speed of the car is used. Because each type of tire has a different design and shape that is adjusted to its speed capability. The following explanation about the speed rating of a car tire:

Understand the Age of Tires and Thread War

In addition to understanding the tire specification code, as a motorist you also need to understand the right time to change a car tire through four-digit numbers, at the bottom edge of the tire. For example the number is written 1214, it means the number 12 indicates the 12th month, December and 14, it is 2014. So you could say the tire was produced on December 12, 2014.
Not only the age of the tire, if you find the term Tread Water on the tire, it means the thickness limit. The function itself is to show when it’s time to change a tire, where generally you can see the line between the tire developments. If the thickness of the tire has touched the line then that’s the time you have to replace the car tire with a new one.