Maybe a dumb question (or two)

[pll]

Thanks pll. I just printed that out.

I think the trick is to remember considering the bike's weight + rider weight. I use that chart to give me a minimum inflation. e.g, the combined weight of me and my bike are under 170 lbs, with 700cx23 tires, I could get away with less than 90psi according to that chart. I pump my front tire to about 90 psi (cushier on my hands) and the rear just above 110 psi (to be on the safe side). I've never had a flat on my tires.