A nice story:
In front of my house is a bike path and on it is a public bike stand with a pump and some basic tools. Earlier as I walked the dog someone standing at the pump said in frustration "air won't stay in this tire, you can just have this crappy bike!" Conveniently I work as a bike mechanic and someone local had recently given me a box of spare tubes that they thought I might be able to use. They don't fit any of my bikes, but they are the right size for this guys bike. He was very happy.
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