What is the reason for the AAA label for automobile tire production?

There are usually a lot of numbers and letters on the tires, and these numbers and letters represent different meanings. Most tires have the DOT logo, the tire DOT is the meaning of the United States Department of Transportation certification, usually followed by a string of numeric letters, which represent the origin information of the tire and the factory**, the last four digits are the production date of the tire. The first two represent the number of weeks of production, and the last two represent the year of production.

In addition, we can also see that there are many numbers and letters on the tires, some are tire brands, M+S means that mud and snow are applicable, some tires will be marked as M S, M&S or MS, and some are marked All, that is, the same tires in all seasons. There are also a series of numbers and letters similar to 195 60 R15 88T, which identify the specifications of the tire

195: refers to the tread width of the tire, which means that the tread width of this tire is 195mm.

60: refers to the flat ratio of the tire, not that the tire thickness is 60mm, but that the flat ratio of the tire is 60% (flat ratio = tire height and tire width 100%).

r: refers to the type of tire, which means that the tire is a radial tire.

15: Refers to the wheel size, this tire is suitable for 15-inch wheels.

88: refers to the load index of the tire, that is, the maximum load of the tire, the maximum load of this tire is 560kg.

t: refers to the speed class of the tire, that is, the maximum speed of the tire, the maximum speed of this tire is 190km h.

In addition to this, there are also numbers on the sidewall of the tire to represent the performance of the tire

The wear resistance index Treadwear reflects the wear resistance of the tire, the higher the value means that the tire is more wear-resistant, and it also means that the hardness of the tire is greater, the worse the comfort, and vice versa. Generally, the wear resistance index is moderate at 280-320. The wear index of the tire is 320, which indicates that the comfort of this tire is better.

traction represents the traction index, and the following letters represent the strength of the grip, from high to low, AA, A, B, C. AA indicates that the tire has very strong traction.

temperature represents the heat generation index of the tire, and the following letters indicate the heat generation level of the tire, and the heat generation level of car tires from high to low are A, B, and C. The heat generation level of this tire is A, which means that the high temperature resistance is excellent.

I wish you a pleasant ride, thank you.

Different brands of tires have different production dates, as follows:

1. The date of the car tire is composed of four digits "AAB". The first two "aa" indicate the weeks of the year, and the last two "bb" indicate the year.

2. The 11-digit number and letter immediately after the "dot" letter on the side of the tire indicate the identification number or serial number of the tire, and the last four digits of the serial number represent the production date of the tire.

3. Tire production date round with Ling ** format: the first two indicate the production week, and the last two indicate the production year, such as the last four digits of the dot are 0807, indicating the 8th week of production in 2007, that is, the end of February 2007.

The life of the tire

Under normal circumstances, the tire makes the life of the tomato about 3 to 5 years, or 60,000 to 80,000 kilometers. However, the service life of tires is very related to the driving habits, parking environment, driving surface, etc., which leads to a certain difference in the service life of car tires.

In terms of driving habits, if the owner is used to braking or accelerating sharply, it is easy to aggravate tire wear. Especially on urban roads, you need to brake frequently, and it is very likely that the car will have to change tires after driving less than 50,000 kilometers. At high speeds, there is no need to brake frequently, and the mileage of the tires will naturally increase, and the life will be longer.

Hello, about such questions.

In this diagram as an example, four digits, the last two digits are the year, and the first two digits are weeks (such as: 2318, that is, the 23rd week of the 18th year) I hope to help you, hope!

Some car owners are not very clear about the meaning of the logo on the tires of their cars, so the following is an explanation of the logo on the side of the tire. For example, a tire is marked as "P 225 65 R 16 89 H", where:

p" refers to passenger car tires (tires used to distinguish them from trucks or other vehicle types). "225" refers to the width of the tire section, which is the width (in millimeters) between the two sidewalls. This width varies depending on the width of the rim that the tire is mated to:

Wide rims with wide tires, narrow rims with narrow tires. Generally, the width of the tire indicated on the sidewall refers to the width of the tire when it is fitted to the rim of the recommended width. "65" is the flat ratio of the tire, is the ratio of the tire width to the tire height, here refers to the tire height accounts for 65% of the tire width, the smaller the value, the more flat.

"r" refers to the structure of the tire, which means that the tire is a radial structure, that is, its ply layer is arranged in a radial pattern in the carcass. "b" indicates that the tire is a bias structure, and the current bias structure of the car tire no longer exists. "16" indicates the rim diameter in inches, and this tire must match a 16-inch rim or it cannot be installed.

89" for load index: this tire has a maximum load of 580 kg. Different load indices represent different maximum loads.

h" indicates the speed class: this tyre has a top speed of 210 km/h. Different letters of the alphabet indicate different speed levels.

The following table lists the maximum speed for each speed class, which applies to all brands of tyres: Speed code maximum speed (km h) M130 N140 P150 Q160 R170 S180 Speed code maximum speed (km h) T190 U200 H210 V240 W270 Y300

To put it simply, you only need to find the DOT mark on the sidewall of the tire (there are on both sides, but only one side has the production date, generally when the four S shop or the new car leaves the factory, the manufacturer will install the production date on the inside, you can't see it.) The last few digits are the production date shown, such as "5509", the following 09 represents the year, and 55 represents the cycle (generally one month is four weeks). In fact, you can go directly to the tire store, theoretically everyone can tell you...