The modern age of speeds is hard to imagine without a car.And the question of which tires to use on your car is directly related to the safety and comfort of road travel. The editors of the site "YaNashla"will help you understand the issue of choosing summer tires. To know more, check out: goodyear wrangler sr-a review

How to choose summer tires: criteria

Load and speed index

A tire is the shoe of a car. Its main tasks are to convert the engine torque into the transnational movement of the car and withstand the load of the weight of the car with the load. Based on this, one of the most important indicators of a tire is the load and speed indices, which are applied immediately after the tire size.

Modern passenger cars, crossovers and SUVs structurally have axle load distribution at full vehicle load in a ratio of 40% x 60%. That is,one axis carries a large load and the calculation is done exactly along this axis.

For the calculation, we take the maximum permissible vehicle weight, which is indicated in the vehicle passport or in the vehicle registration certificate, for example, 1700 kg. Determine the load on the busiest axle - 60% of 1700 kg, we get 1020 kg. We divide this result by the number of wheels on the axle (in most cases these are two wheels) and we get the load on one wheel - 510 kg. According to the table we determine the nearest larger load index - 85. The speed index is determined by the maximum possible speed declared by the manufacturer.

Seasonality of tires

Tires are divided into summer, all-season and winter, and they differ not only in the tread pattern, but also in the composition of the rubber compound from which they are made. The latter makes it possible to achieve the physical properties of a tire required for operation in various conditions.

Physical properties such as wear resistance, strength,resistance to alternating loads, energy intensity directly affect fuel consumption,service life of a tire and car suspension elements.

Summer tires are made from a harder rubber compound. They are more resistant to wear, thanks to which the tread can be made shallower,and the tire itself is slightly lighter. Tires made from a hard rubber compound have lower rolling resistance, which, combined with the lower weight, results in noticeable fuel savings.

Tire size

We determined the load and speed indices, then it is necessary to determine the standard size of the tire.

Tire size is determined by width, section height as a percentage of width, cord construction, and rim diameter.

For example, 195/60 R15 means that the width of the tire is195 mm, the height of the profile (the size from the edge of the rim to the outer diameter of the wheel) is 60% of 195 mm, that is, 117 mm, R is a radial tire, the landing diameter is 15 inches (381 mm ).

Tire selection errors and their consequences

When installing a tire with an outer diameter greater than the recommended one (with an increased profile height), the actual vehicle speed will be higher than the speed shown by the speedometer, since the speed readings are taken from ABC sensors, which read the wheel speed.