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Old 08-05-2008, 08:46 AM   #13
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Join Date: Dec 2001
Location: Toronto
Posts: 21,082
When tires are made, they are made through vulcanization. This process cannot be stopped, only slowed down. This is why rubber gets hard after they get older.

Mirek, it doesn't go hard because you are constatly driving on it, wearing the outer layer off.

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