Blackburn Airstik 2 Stage Mini Pump. At only 7 long this is almost into the micro pump category, but we'll let it slide. The Blackburn Airstik 2 Stage mini pump easily fits into a Cycling Jersey pocket and inflates a 700x23 tire up to about 110 PSI. It also has this cool two stage system that lets you flip a switch for low pressure pumping when you're just getting started, then switch to high pressure, low volume pumping to finish it off. Pretty good for a little guy like this. But don't be fooled by the small stature. This little guy is built tough for all day riding and abuse.