Quote by Volnix:
"I also carry a presta to Schraeder adaptor so I can get the tires up to 80 psi on a gas station."
THIS!
Carrying a 25 cent Presta-to-Schraeder Adapter is the easy way to get from the 50-60 PSI the mini and micro pumps get your tire inflated to...to the 80-90 PSI the shop air can deliver at a gas station or, in the case of my neighborhood, ANY Amish dude or redneck with his garage door open! We all have multiple air compressors and enjoy helping a guy out.
In the good ol' daze of toe clips, the toe clip screw was the same size as a Presta valve thread and we carried the adapter threaded onto that screw, behind the front pedal plate. Unseen...so The Rules© were not violated.