Originally Posted by
cyccommute
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.
Maybe its me, but three times out of five, when the pressure gauge goes over the valve its not going to be a good seat and 5lbs. are going to go just like that. That's schraeder heads. I'm usually checking car tires with a pressure gauge so, if I let too much air out, checking it, no sweat just put the air chuck back on and Portland General Electric does the rest. On a bike tire I was pumping up with a hand pump... I'd do a thumb squeeze and call it very good.
H