Winter vs Summer Tires - What's The Difference?

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Which tire is best, and when? Winter/snow tires vs summer tires. Bridgestone Blizzak WS80 (Winter) - http://amzn.to/2hqRTgD Bridgestone Potenza RE-71R (Summer) - http://amzn.to/2gXJX2Q Subscribe for new videos every Wednesday! - https://goo.gl/VZstk7 Winter Tires: https://youtu.be/8OifbH5siF0 Winter tires are designed with a compound that remains flexible at low temperatures, while summer tires are designed to remain more firm, but will have a stickier compound at higher temperatures. An all-season tire is simply a compromise between the two. The major difference between the compounds comes down to something called the glass transition temperature. This is the temperature at which molecules in the rubber of the tire move less freely. In this low energy state, the molecules become more plastic-like, and this reduces the friction between the rubber and the road. For winter tires, the glass transition temperature is very low, where as for summer tires this transition range can be around 40-45 degrees F. Below this temperature, winter tires will perform better. When the temperature of the tire increases above the glass transition temp, the molecules move more freely, the rubber becomes more pliable, and the tire will have more friction with the road, giving better traction. That said, as temperatures increase, there is a point at which the molecules begin to move too freely, and the rubber starts to become gummy, dramatically increasing wear, and changing the handling charact

Published 2016-12-14 · Watch on YouTube ↗
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