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Old 06-28-2012, 10:07 AM   #1
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Join Date: Aug 2011
Posts: 82
Default rubber soles in shoes gets harder over time?

Hello all,

Recently I was having this conversation with a friend. I like to stock tennis shoes whenever I find a good deal. He disagreed, saying that rubber soles in shoes get harder over time, and therefore it might not be a good idea to stock shoes for a long time, because it cannot be good for your knees.

Since we're both no experts in shoes, I'm wondering if anyone know if that's a fact or just a myth?
Wilson Kobra Tour, Wilson BLX Six.One 95, Babolat Propulse 2
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