Filling up the tire in an in motion

[Seenvoicle]

How do yall do it? Any special tire pumps you buy? 

[Professur]

I'd suggest a pump with a quick connect as opposed to a screw on connector. These tires are small and the air lost in the time it takes to unscrew the connector can add up. I'd suggest a small hand pump for more control. I've been using the 12V pump I keep in my car, and just the time it takes to turn it on and off is 5psi. There's a chart around here somewhere that maps rider weigh against tires size to come up with a good riding pressure.  I'm running about 4 psi under it's recommendation.