PeaceGrabber,

You are a complete moron.

First, you leave home...where you have a pump...with your tires low.
Second, you try to inflate high-pressure bike tires at a gas station.
Third, you go to a Dollar Store, abuse their merchandise with no intention of making a purchase and have the gall to denounce them.
Forth, you finally show up at a bike shop...that has to inform you that, yes...you need to check and inflate your tires regularly and they do that for you because they sell bikes and take pity on idiots...