Newsletter Item for (86822): What Are Those Tiny Bits of Rubber That Stick Out of Tires?

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What Are Those Tiny Bits of Rubber That Stick Out of Tires?

mfna_dek: 

Today’s Big Question: What are those tiny bits of rubber that stick out of tires?

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mfna_real_node: 
What Are Those Tiny Bits of Rubber That Stick Out of Tires?
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