Hey sometimes we have to learn things the hard way
One time I had a flat on my way to work on a Sunday,
no biggie I thought - I have a flat repair kit and a new
tube. When it was time to pump the tube, I noticed my
Planetbike Versair wasn't pushing the air in. Apparently
a piece had fallen off and the air was being lost. Lesson
learned, check your pump once in a while