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Markings on tires

Each tire has information that not only allows you to determine its size, but also the purpose, the method of mounting on the rim, etc. As an example, take the 195 / 65R15C 91T tire:

195 – tire width in millimeters,

65 – the height of the tire given as a percentage in relation to the width, in our case it will be 65% from 195, or 126.7 mm,

R15 – diameter of the rim in inches,

C – this letter informs us that it is a tire adapted to increased loads, eg for delivery vans,

91 – tire load index, which determines the load the tire can carry. When multiplying the permissible load for a single tire by the number of wheels, the value should exceed the permissible total weight of the vehicle on which the tires are mounted. In our case, 91 means 615 kg,

T – this letter defines the maximum speed to which the tire is adapted. For our tire it is 190 km / h.

In addition, on each tire is recorded the date of its production – usually in a four-digit format, where the first two digits denote the week, and the next two years, in which it was produced. For example, 0616 means that the tire was produced in the sixth week of 2016. On the tire, we can also find the country of production and the code of the factory in which it was made. In addition, if the tire is directional, there are arrows on it to determine which side to roll while driving forward. If, on the other hand, it is asymmetrical, we have signs indicating the external and internal side.

In addition to these markings on the tires, we can find a lot of other useful information, such as the TWI marker, which determines the minimum tread depth for the tire, the maximum pressure to which it can be inflated, and all kinds of warnings that allow safe use.

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