How to inflate a bicycle tire is very simple, but beginners often have trial and error, so I'm going to write about how to inflate a tire. 1. First, remove the rubber stopper by turning it. 2. Unscrew the device that blocks the inflow of air. 3. As shown in the picture, you can inject air after loosening the device that blocks air inflow to some extent. 4. If you press the air injection machine ..