Tire specification 185R14C What does the C at the end mean?

The C behind the tire specification 185R14C means that the tire specification is imperial.

The meaning of each letter in tire specifications: Specifications are symbolic data of tire geometric parameters and physical properties.

There are three ways to express tire specifications: A. Metric (m); B. Mixed metric and imperial; C. Imperial; Imperial tire specifications are often represented by a set of numbers. The first number indicates the tire section width, and the latter one The numbers indicate rim diameter, all in inches.

Tire specification 185R14C means that the tire specification is imperial, the tire section width is 185, and the rim diameter is 14.

Extended information:

1. The meaning of the data on the tire:

1. Tire structure: "R" means radial tire, "D", " "One" means bias tire.

Others: "XL" means partially reinforced tires, "TG" means engineering tractor and grade machine tires (off-road use), "NHS" means off-highway tires.

2. Layer: The layer refers to the nominal number of layers of cords in the rubber layer of the tire, which is not completely consistent with the actual number of cords. It is an important indicator of tire strength. Levels are marked in Chinese, such as level 12; levels are marked in English, such as "14P.R" which means level 14.

3. Cord material: Some tires are marked separately, such as "nylon" (NYLON), which is usually marked after the layer; some tire manufacturers mark it after the specifications, using the first Chinese pinyin Letter representation, such as 9.00-20N, 7.50-20G, etc., N represents nylon, G represents steel wire, M represents cotton thread, and R represents rayon.

4. Load and air pressure: Generally, the maximum load and corresponding air pressure are marked. The load is in "kg" and the air pressure is the tire pressure in "kilopascals".

5. Rim specifications: Indicates the rim specifications that match the tires. Convenient for practical use, such as "Standard Rim 5.00F".

6. Balance mark: The mark is made of colored rubber and printed on the sidewall, indicating that the tire is the lightest here. When assembled, it should be facing the valve to ensure the balance of the entire tire.

7. Rolling direction: The pattern on the tire is particularly critical for water drainage and anti-skid during driving. Therefore, off-road vehicle tires with asymmetric patterns are often equipped with arrows to mark the rolling direction to ensure the adhesion, anti-skid and other properties of the design. . If installed incorrectly, it will be counterproductive.

8. Wear limit mark: Use rubber strips and blocks on one side of the tire to mark the wear limit of the tire. Once the tire wear reaches this mark, it should be replaced in time, otherwise the tire will burst midway due to insufficient strength.

9. Production batch number: Use a set of numbers and letters to indicate the year, month and quantity of the tire. For example, "98N08B5820" means the 5820th tire produced by Group B in August 1998. The production batch number is used to identify the tire's condition and storage time.

10. Trademark: A trademark is the logo of a tire manufacturer, including trademark text and patterns. It is generally prominent and eye-catching and easy to identify. Most of them are marked in conjunction with the name of the manufacturer.

11. Other marks: such as product grade, production license number and other ancillary marks. It can be used as reference and information when choosing.

2. Methods to extend the service life of tires

The first step is to remove the small stones in the tire tread. This cannot be done with bare hands. You can use screwdrivers and awls, etc. tool. Of course, this is more physically demanding and takes up time. During the entire cleaning process, you have to turn the steering wheel repeatedly to get the right angle.

Check your tire pressure every month or before every long run. Recommended tire pressure values ??can be found on the fuel tank cap, door location or owner's manual. If you really can’t find one, you can also buy a tire pressure gauge to measure it yourself.

Appropriate tire pressure can slow down the aging of rubber. The Beijing Consumers Association commissioned the National Rubber Tire Quality Supervision and Inspection Center to conduct experiments. The experimental results show that if the air pressure exceeds or falls below the standard by 10%, the tire life will be reduced by about 4%. ; If the air pressure exceeds 20%, the tire life will be reduced by 25%; if the air pressure is 20% lower than the standard, the tire life will be reduced by 20%.

Carry out four rotations every 8,000 to 10,000 kilometers. For the transposition method, you can also refer to the user manual. The purpose of rotation is to make the wear more even. You can perform four-wheel rotation by yourself, or you can find a tire shop or beauty shop.

While rotating the four wheels, you can perform a four-wheel alignment check to prevent the vehicle from "deviating".

Baidu Encyclopedia—Tires