Originally Posted by
pdlamb
I'm not aware of a pencil gauge that'll read up to 100 psi and work on Presta rims. The Zefal dial gauge [MENTION=197614]fietsbob[/MENTION] referenced works well, though.
For that matter, so does my thumb.
Storage space is primary for me. Here's a pencil gauge rated to 120 lbs. You can calibrate it at home against a digital gauge. Add a Presta to Schrader screw on converter, also tiny, and your good to go even with Presta valves.