Winter and summer tires, comparative tests

Because during the summer tires and winter tires during the'estate'inverno? Firstly, for safety reasons, but not only. The Helvetic'istituto TCS, the company used in Switzerland in the field of road information and assistance, made ​​some comparative tests of summer and winter tires on sale in mid-level market, highlighting the significant differences in terms of safety, when comparing the characteristic structures of different tires.

If we consider the difference in braking distance will probably agree that any car driver to mount the tires appropriate to the season is a matter of absolute necessity. All''aspetto security adds to economic efficiency, because the change of tires at the right time can also help you save money.

Here is an overview of the tests performed by the TCS:
1. Braking on dry approx. 10 ° C: at these temperatures, the summer tires'attuale mixed with silica component and the structure of the profiles are an advantage, because the braking distance is ca.12 meters shorter than that of winter tires.
2. Braking on dry approx. 20 to 25 ° C: at high temperatures, the compound of summer tires and their profile is a clear advantage compared to winter tires. The braking distance is less than 18 meters to that of winter tires.

3. Braking in the wet at approx. 10 ° C: at low temperatures, the structure of the profile and the slats give
winter tire to a clear advantage. The'acqua is ejected more efficiently and the rubber compound is designed for low temperatures.
4. Braking in the wet at approx. 20 to 25 ° C: at high temperatures is affected by the compound of winter tires is softer. The results are slightly better than summer tires.
5. Braking distance on snow on snow, the summer tire is a risk for high security.
The braking distance is longer by about 50% and the residual velocity is still 29 km / h at a speed brake-off of 40 km / h.
6. Consumption: about fuel consumption, the difference between a vehicle equipped with summer tires
and a winter tire is about 0.1 l/100 km.
7. Wear to approx. 10 ° C: at low temperatures, the winter tire abrasion is subject to slightly less than that of a summer tire. The wear of a tire type each season is 10% higher than that of a winter tire.
8. Wear to approx. 20 - 25 ° C: at high temperatures, such as a tire'usura every season is about. 10%, and that of a winter tire approx. 15% higher than a summer tire.

In terms of economy cycle for the change of tires depends on several factors (region of application, driver,
vehicle, etc..). Tests show the TCS, however significant differences in wear found in the analysis of new products.
With the use of alternating summer and winter tires, the costs for their purchase and their exchange rates, calculated over a period of 6 years or for the provision of 90000 km, including'acquisto of 4 aluminum rims and their balance,''are a little less high than circulating throughout the'anno with summer tires.
Who really wants to save money, can equip your vehicle's tire size cheaper. For the winter set of tires, tire size can be chosen slightly below the summer, apparently approved for their car, to be mounted on steel rims.

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