Experts explained the effect of extreme heat on car tires

Automobile tires are designed for use in a wide range of temperatures, according to standards, the upper limit of ambient temperature for summer tires is +55 ° C. However, when driving, the operating temperature of the tire rises strongly relative to the air temperature and is usually several tens of degrees higher. Experts of the Cordiant holding told Izvestia about this on May 25.

"The highest values are observed with a combination of factors — high ambient temperature, heated asphalt, maximum vehicle load and heavy traffic with constant high speed or with an abundance of braking. These are the most difficult conditions for tires. In the first case, for example, when driving on a highway, the tire heats up from the rolling resistance process, in the second case, it also heats up from the mechanisms of the braking system," the experts explained.

In such conditions, the tread of highly heated tires wears out more intensively and the risk of internal damage increases on those tires that are undergoing repairs or in case of any operational violations, such as insufficient pressure. If the tire is lowered to 1-1.5 atmospheres, which is not always visually noticeable, this will lead to increased heat generation of the tire already heated to the limit, which is dangerous for the tire to fail, that is, its explosion on the move, experts warned. It is also worth considering that tire pressure rises in the heat, this is a natural process, and it does not need to be reduced.

"The main rule of tire operation in the heat is to monitor the internal pressure with a pressure gauge (always on cold tires, before driving) and when driving at high speed, periodically stop every three to four hours on the way for a half-hour rest. At the same time, the higher the speed, the more frequent and longer the stops should be," the holding's specialists added.

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Earlier, on May 15, experts said that car tires are a technically complex product, the properties of which change over time.: the level of traction decreases, the risk of aquaplaning increases, as well as noise during movement.