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Title: Use at your own risk
Review: I bought three sets of this. One morning I walked into my garage and discovered a flat tire. Took the tire off and took it to the local walmart for repair. They came back saying there was nothing wrong with the tire. I came back, tested the valve that was on the tire and guess what? The valve was defective and caused all air to be expelled. I immediately took all of them off from all tires. Cannot risk having flats when I am not expecting it. Sent one set (the other two sets were past 30 days) back and got only 66 cents in refund (thanks, AMAZON.COM for your generosity). I am trying to find a way to let Amazon.com know that I am not happy with the refund but have not found a way to contact them yet. At any rate do not buy this product, too risky....
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