Originally Posted by
DrIsotope
So you want a pump to use at home, or for mounting on the bike? Because if it's for filling up tires at home,
...or any power inflator that uses batteries you already have. If you don't have any cordless tools, the Ryobi route is the cheapest. The inflator is $20, you can get a battery for $25, and a charger for $25. Comes with an excuse to buy any number of other 18V cordless tools.
Based on this thread and one other recommendation in the past year, I decided to buy one of these today. I love it! (I already have the Ryobi 18V lithium battery system.)