Enlarge / A closeup of Bridgestone’s newest Blizzak tire in its pure surroundings. (credit score: Bridgestone)
Monday marks the official begin of winter right here within the US. Not that the climate wants the calendar’s permission; many components of the nation began seeing snow weeks in the past. And, in fact, you needn’t watch for December 21 to swap over to winter tires. For one factor, the sticky compounds utilized in summer time efficiency tires aren’t designed to work when the mercury drops under 45 levels Fahrenheit (7.2°C), and that may occur properly earlier than the bottom disappears beneath a layer of snow.
“That has to do with the glass transition temperature of the compounds. The compounds get tougher because the ambient temperatures get cooler, and winter tires are designed for a a lot decrease vary and temperature,” defined Dale Harrigle, chief engineer at Bridgestone.
That is partly all the way down to the combination that makes up a winter tire. “We’re utilizing silica tread compounds in our devoted winter merchandise. We will tune the devoted winter merchandise to have good grip at decrease temperatures with out considerably affecting the rolling resistance we might have 20 years in the past. So I imagine plenty of the compound and materials know-how is what’s enabled a few of these leaps in efficiency,” Harrigle informed me.Learn 5 remaining paragraphs | Feedback
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