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March 17, 2014

Bulletin says replace tires with cracks

A recent General Motors Corp. technical bulletin has Modern Tire Dealer Editor Bob Ulrich worried. It involves cracks on tires caused by cold weather.

The bulletin, written about on www.consumerreports.com, says the following:

1. UHP summer tire compounds harden when it gets cold.

2. The cold can cause cracks.

3. If the tires have cracks, they should be replaced.

Is it really as simple as one-two-three? Is the bulletin really implying that all tires that show signs of cracking should be replaced, or just cracking caused by the cold?

Is government intervention just around the corner?

To get a better idea of what all the fuss is about, check out Ulrich's latest blog, "Combining UHP and winter tires is not all it is cracked up to be."

What are your thoughts on the matter? Read the blog, and let us know what you think by leaving a comment.

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  1. Tire | March 17, 2014 at 12:32PM
    Several tire manufacturers already have this warning on certain tires tire labels. FYI. They state to not expose the tire to temperatures below 14 degrees.

  2. David | March 21, 2014 at 08:10PM
    These warnings would be related to the tire's "glass transition" temperature and are certainly in order according to the manufacturer's choice of tread compound. I note for example that Yokohama has a warning for its ADVAN Neova AD08..."must be used and stored at temps above 14 deg. F to "avoid tire damage." Toyo has similar warnings for its "street legal DOT tires."

    Ultra "soft" tread compounds? Yes, their glass transition temps will make them subject to cracking at sub freezing temperatures.

    It has always been this way!

  3. Peter | March 24, 2014 at 10:55AM
    I've noticed the past several years that Michelin tires crack in three years or less

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