In the first of this two-part series, Bailey examined several tire inner tubes, chose one, and blew it as tight as she could get it by mouth. Now she has hooked it up to her foot pumps, blows a little to tighten it up some more, and proceeds to pump until it can take no more.

In the first of this two-part series, Bailey examined several tire inner tubes, chose one, and blew it as tight as she could get it by mouth. Now she has hooked it up to her foot pumps, blows a little to tighten it up some more, and proceeds to pump until it can take no more.