Originally Posted by chinarider
Wow, that seems low. The tires say 120 max.
The important thing to note is 120
max. Many manufacturers also talk about
min pressure.
Originally Posted by chinarider
I'm a little confused about the comments that lower PSI helps protect against flats
I had trouble getting my melon around that. This is how I think about it: there are pinch flats and there are puncture flats. Pinch flats are from too low a pressure and those we can all understand (tube gets pinched between rim and pothole.)
Puncture flats are harder. Think of the "bits of glass" as a high school ring on the fist of some guy in a bar fight. The tight skin in your forehead is the high pressure tire and your cheek -- the lower pressure tire. If he hits you in the forehead, you are going to bleed. Blood here = air in your tire. He hits your cheek, your blood stays yours.
As always... the best thing you can do is avoid the "bits of glass."