|New Floor Pump||Scot_Gore|
Jan 9, 2002 3:05 PM
|I purchased a new floor pump today.
It has two scales on it.
One is PSI - I know what that is.
What's bar? barometric pressure, something metric.
Confused non-metric American
|1 bar=14.50377 psi (nt)||Luis|
Jan 9, 2002 3:24 PM
|OK, I see that.....||Scot_Gore|
Jan 9, 2002 3:37 PM
|10 bar lines right up with 145psi, but, what's a bar. Is it metric, how do you use it, do tires come with bar ratings (going to look now), do you Europeans think I'm a bonehead for asking.
guy hoping he's not sounding like flame bait
Jan 9, 2002 3:41 PM
|there it is right on my tire, 8-8.5 BAR, never noticed it before.
|Not completely clear||Kerry Irons|
Jan 9, 2002 5:15 PM
|One atmosphere pressure at sea level = 14.696 psi. One bar is sort of one atmosphere = 14.5 psi. Close enough for cyclists, but not even close for engineers. I've asked a number of folks why a bar doesn't equal an atmosphere, and never gotten an answer. Maybe somebody in the alps set the figure? Metric pressure is pascals, more typically kilo pascals, and if you'll go out to your car RIGHT NOW, you'll see from the sidewall markings that its about 6.82 kPa per psi.|
Jan 9, 2002 5:48 PM
|it says 300 KPA.
Sorry I took so long.
Jan 9, 2002 6:59 PM
|I have got to think the difference is just a difference in what constitutes a standard atmosphere. Not much difference in temperature would account for the variation. It seems apparent that whoever decided what a bar was meant to make it one atmosphere.|
|A bar is a place where you get an adult beverage||DCP|
Jan 9, 2002 3:50 PM
|That kind of bar is barometric pressure. I believe that one bar is the "normal" barometric pressure on a standard day at sealevel. Slightly more obvious to an average user that pounds per square inch or inches of mercury, which are other measures of the same thing.|
|and strike with women, but maybe that's just me||Scot_Gore|
Jan 9, 2002 3:59 PM
So I'm pedaling around 16 days of pressure at sea level
No wonder I get so tired.
Again, thanks all
|I mean "strike out" NM||Scot_Gore|
Jan 9, 2002 4:00 PM
|re: New Floor Pump||SnowBlind|
Jan 9, 2002 3:54 PM
|1 "Bar" is the pressure of the atomosphere at sea level. It is a very old measurement, not metric. metric is Kilo per square centimeter.|| |