I haven’t had very good luck with small/mini/micro pumps.  I’ve had some that worked marginally, and the rest have been literally useless.  I also have some CO2 cartridges and valve, which work, but are wasteful, expensive, and rattle around in my jersey pockets.

Below is a Park Tool PMP-5, an adjustable frame pump that fits a range of frame sizes with and without a frame pump mounting pegs.  In addition to freeing-up my jersey pockets, this pump actually works.  The only change I made was to cover the silver and blue aluminum barrel in black vinyl– the silver and blue didn’t look so great with the ’90s Trek ‘Ice Violet’.

Overall, this is an inexpensive pump that fits a lot of different frames and can inflate a road tire to a reasonable pressure in a reasonable amount of time. This may not sound like much, but it’s more than can be said for most pumps.

The PMP-5 fits securely on my 52cm steel Gunnar Crosshairs, without pump mounting peg, and with a very short head tube:

And, here it is on the 56cm lugged carbon Trek 2120, with pump mounting peg, which previously used a Zefal HPX-4 :