Originally Posted by
chas58
Try doing it twice, and see how much pressure you lose. Easy test.
FYI - most people will be better off riding at the minimum pressure - especially for the front wheel (assuming you don't way over 200lbs). The problem with that is that performance begins to drop rapidly if you go below the minimum pressure, so going above it gives you some wiggle room.
Floor pump with a gauge is a good investment.
Assuming that you mean checking the pressure twice, I have done that...many times. The difference between the first reading and the second
may be a single psi. It's not that critical.