Summer tyre because of its composition and seasonal characteristics of the ice and snow will not overpower and frost will not stand. The car is contraindicated riding in the winter on summer tires, experts believe.
Rubber compound makes a summer tire is absolutely unsuitable for driving on winter roads. In the cold summer tires will lose their properties: no traction, no clutch and no control lateral drift. It will just be sabbey" and to be completely unfit for use.
Research the company Conti showed that the adhesion of summer tires with snow road below 60% compared with winter rubber. Even if a car on a summer tire in the winter begins to move, then when driving the steering and brake maneuverability will lose its effectiveness.
However, many believe that the summer tires with a lower speed index , for example, S or T, and in cold weather will not fail. Such motorists simply wrong.
Summer tyre speed index which is equal to S (up to 180 km/h) or T (up to 190 km/h), not suitable for use in winter conditions because of the rubber compound. Tire for summer with speed category H (up to 210 km/h) or V (up to 240 km/h) it is strictly forbidden to drive in the winter on snow-covered road. The reason lies in the fact that summer tyre in most cases is as wide rubber profile. Wide tread surface reduces pressure on the road, so summer tires in the winter is not able to cope with driving on snow.
By the way, winter tires in the summer becomes softer. And spikes, clinging to the asphalt, will not only create additional noise and discomfort, and even fall out when driving. Tire for winter summer wears out faster. So riding in the summer to winter tyres is not safe.
All-season tires for year-round operation is also not good. Marking All season is put on tires that are not designed for the Russian climate, and to countries with a more mild climate.
So don't skimp on your safety and ride on tires that don't match the season: in winter on summer tires or summer / winter tire.