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Old 12-01-04, 03:55 PM
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Well, since a bike has a top tube, down tube, seat tube... and inner tubes, I wasn't sure what you were talking about. Not sure I've ever seen a 'solid' inner tube. Usually they are all filled with air. There are puncture resistent tubes and the ones that are foam filled to help reduce the chance of punctures. But, I haven't seen a solid one before.
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