Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 04-11-06, 06:25 AM   #1
cyclezealot
Senior Member
Thread Starter
 
cyclezealot's Avatar
 
Join Date: Sep 2001
Location: Fallbrook,Calif./Palau del Vidre, France
Bikes: Klein QP, Fuji touring, Surly Cross Check, BCH City bike
Posts: 13,166
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 42 Post(s)
Pressured air units in Europe.US Equivilant please?

We are new to Europe. I see no references to compare lbs per square inch, to whatever units are used here in Europe. ANyone help me out on this basic question.
First, what are the units. And what are equivilant units in US lbs. per square inch. My race bikes takes 110 US pounds and my touring bikes require 85 lbs. My pump I bought over reads out in pounds per square inch. thanks lots. How can I look up these units, I don't even know what they are.
I have no reference books, at present - most of our books are somewhere in the Middle of the Atlantic.
cyclezealot is offline   Reply With Quote
Old 04-11-06, 06:40 AM   #2
juicemouse
Senior Member
 
juicemouse's Avatar
 
Join Date: Mar 2005
Location: Happy Valley
Bikes:
Posts: 813
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I believe Bars are the most popular non-scientific unit of pressure in most of the rest of the world. 1 bar = 14.5 psi. The more scientific SI unit of pressure is the Pascal. 1 Pa = 0.000145 psi
__________________
It is my belief that every person in this world has something to teach, and everything to learn.

In memory of Jim Price (aka. sydney) ...
juicemouse is offline   Reply With Quote
Old 04-11-06, 06:44 AM   #3
TallRider
me have long head tube
 
TallRider's Avatar
 
Join Date: Oct 2005
Location: Chapel Hill, NC
Bikes:
Posts: 4,106
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I don't know what units are used in Europe. And if you know enough to know that they're not using PSI on that side of the pond, you should know enough to tell us what units they do use. I just noticed from the sidebar that you're in France, but that would have been worth noting in your post as well.
I'm sure some knowledgable people will answer in a bit, but for now I'll read the equivalent "bar" off of my pump gauge...
2 bar - 29 psi
4 bar - 58 psi

Anyway, all around the dial, each bar is worth 14.5 psi.
Hope this helps. But again, there are other people on this forum who have been to Europe.
TallRider is offline   Reply With Quote
Old 04-11-06, 06:48 AM   #4
Juha
Formerly Known as Newbie
 
Juha's Avatar
 
Join Date: Mar 2002
Location: Helsinki, Finland
Bikes:
Posts: 6,263
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Isn't the psi measure same in Europe and US? At least your numbers are in the same ballpark as mine... also the conversion site http://www.convert-me.com/en/convert/pressure does not list a separate "metric" psi reading.

--J
__________________
To err is human. To moo is bovine.

Who is this General Failure anyway, and why is he reading my drive?


Become a Registered Member in Bike Forums
Community guidelines
Juha is offline   Reply With Quote
Old 04-11-06, 06:48 AM   #5
jemoryl
Senior Member
 
Join Date: Sep 2004
Location: New Jersey, USA
Bikes:
Posts: 1,007
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
As the previous poster pointed out, most European gauges are in Bar, with 1 Bar = 14.5 psi. If you look on your tires you might see both units listed (e.g. my tires say "7-9 bar"). To get 110 psi, inflate to 7.6 Bar.
jemoryl is offline   Reply With Quote
Old 04-11-06, 06:50 AM   #6
AnthonyG
Senior Member
 
AnthonyG's Avatar
 
Join Date: May 2005
Location: Queanbeyan, Australia.
Bikes:
Posts: 3,676
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 23 Post(s)
Quote:
Originally Posted by juicemouse
I believe Bars are the most popular non-scientific unit of pressure in most of the rest of the world. 1 bar = 14.5 psi. The more scientific SI unit of pressure is the Pascal. 1 Pa = 0.000145 psi
My Mac computer has a converter as one of its widgets and it says the same thing. 1 bar = 14.5 psi.

7 bar is 101 psi and 8 bar is 116 psi.

Regards, Anthony
AnthonyG is offline   Reply With Quote
Old 04-11-06, 06:53 AM   #7
TallRider
me have long head tube
 
TallRider's Avatar
 
Join Date: Oct 2005
Location: Chapel Hill, NC
Bikes:
Posts: 4,106
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
If you're mathematically-minded, you could even use a calculator to convert by a factor of 14.5 (that four people in a row have so kindly provided, albeit at least the first two posted without having seen the other's post), instead of relying on a cute Mac converter
TallRider is offline   Reply With Quote
Old 04-11-06, 06:55 AM   #8
supcom
You need a new bike
 
supcom's Avatar
 
Join Date: Aug 2002
Bikes:
Posts: 5,433
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
If you look closely at the sidewalls of your tires, your will almost certainly see pressure maximums in bars as well as psi.
supcom is offline   Reply With Quote
Old 04-11-06, 08:37 AM   #9
2manybikes
Dog is my co-pilot
 
2manybikes's Avatar
 
Join Date: Jun 2003
Bikes: 2 many
Posts: 15,505
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 17 Post(s)
Quote:
Originally Posted by supcom
If you look closely at the sidewalls of your tires, your will almost certainly see pressure maximums in bars as well as psi.

Very true. Also Google "metric conversion calculator" for an on line converter, and just put in Bars and get PSI. One bar is atmosphere pressure at sea level, about 14.5 psi.
2manybikes is offline   Reply With Quote
Old 04-11-06, 08:43 AM   #10
jsharr
You Know!? For Kids!
 
jsharr's Avatar
 
Join Date: Apr 2005
Location: Just NW of Richardson Bike Mart
Bikes: '05 Trek 1200 / '90 Trek 8000 / '? Falcon Europa
Posts: 6,157
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
If you brought your own pump, labeled in PSI, what is the problem? It will work the same in EU as in USA.
__________________
Are you a registered member? Why not? Click here to register. It's free and only takes 27 seconds! Help out the forums, abide by our community guidelines.
Quote:
Originally Posted by colorider View Post
Phobias are for irrational fears. Fear of junk ripping badgers is perfectly rational. Those things are nasty.
jsharr is offline   Reply With Quote
Old 04-11-06, 09:24 AM   #11
AndrewP
Senior Member
 
Join Date: Sep 2001
Location: Montreal
Bikes: Peugeot Hybrid, Minelli Hybrid
Posts: 6,521
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
1 bar is 1 kg/sq cm. Standard atmospheric pressure is 14.7 psi. Close enough but not the same.
AndrewP is offline   Reply With Quote
Old 04-11-06, 12:47 PM   #12
brokenrobot
Sweetened with Splenda
 
Join Date: Sep 2003
Location: Brooklyn, Alabama
Bikes: Too many 80s roadbikes!
Posts: 2,335
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by 2manybikes
Very true. Also Google "metric conversion calculator" for an on line converter, and just put in Bars and get PSI. One bar is atmosphere pressure at sea level, about 14.5 psi.

Or skip a step and just google "120psi in bar" and let Google's built-in calculator do the work. It'll also convert pretty much any unit to pretty much any other unit... super useful. It's actually the reason I installed the google deskbar.
brokenrobot is offline   Reply With Quote
Old 04-11-06, 01:17 PM   #13
cyclezealot
Senior Member
Thread Starter
 
cyclezealot's Avatar
 
Join Date: Sep 2001
Location: Fallbrook,Calif./Palau del Vidre, France
Bikes: Klein QP, Fuji touring, Surly Cross Check, BCH City bike
Posts: 13,166
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 42 Post(s)
Harr, My dilema was. Two days ago bought a new utility bike. Never occured to me as I left the shop to discuss this matter with the shop owner in Argeles. Well, those tires had markings in bars, I see know. My pump lists psi. on it's gauge. As pumping up the tires , did not know what to do. I had no idea what a bar is. know we all know. All caused by the US use of pounds over Kg. Makes sense now.
14.5 -thanks all.
The One time I filled my car tires. Think the gauge at the pump said 2.7. I used my tire gauge which said 35.
cyclezealot is offline   Reply With Quote
Old 04-11-06, 02:15 PM   #14
cyccommute 
Mad bike riding scientist
 
cyccommute's Avatar
 
Join Date: Nov 2004
Location: Denver, CO
Bikes: Some silver ones, a black one, a red one, an orange one and a couple of titanium ones
Posts: 17,827
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 80 Post(s)
Quote:
Originally Posted by cyclezealot
We are new to Europe. I see no references to compare lbs per square inch, to whatever units are used here in Europe. ANyone help me out on this basic question.
First, what are the units. And what are equivilant units in US lbs. per square inch. My race bikes takes 110 US pounds and my touring bikes require 85 lbs. My pump I bought over reads out in pounds per square inch. thanks lots. How can I look up these units, I don't even know what they are.
I have no reference books, at present - most of our books are somewhere in the Middle of the Atlantic.
Bookmark http://www.onlineconversion.com/. It's the handiest and best converter around. All us science guys use it as much as the rest of the world uses Google
__________________
Stuart Black
New! Pokin' around the Poconos A cold ride around Lake Erie
New! Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
Days of Wineless Roads. Bed and Breakfasting along the KATY
Twisting Down the Alley. Misadventures in tornado alley.
An Good Ol' Fashion Appalachian Butt Whoopin'.
cyccommute is offline   Reply With Quote
Old 04-11-06, 02:35 PM   #15
r-dub
likes avocadoes
 
Join Date: Nov 2004
Location: oakland, ca
Bikes: heh, like that info would fit here...
Posts: 1,125
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
as much as I love onlineconversion.com, google is increasingly useful for standard conversions. For example, if you type in "145 psi to bar", the first line is "145 pounds per square inch = 9.99739808 bar". It does currency and most units for measuring just about anything.
r-dub is offline   Reply With Quote
Old 04-11-06, 04:06 PM   #16
cyclezealot
Senior Member
Thread Starter
 
cyclezealot's Avatar
 
Join Date: Sep 2001
Location: Fallbrook,Calif./Palau del Vidre, France
Bikes: Klein QP, Fuji touring, Surly Cross Check, BCH City bike
Posts: 13,166
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 42 Post(s)
Quote:
Originally Posted by cyccommute
Bookmark http://www.onlineconversion.com/. It's the handiest and best converter around. All us science guys use it as much as the rest of the world uses Google
Hey. thanks .Checked it out. Made it a favorite. Should never have to ask a similiar question ever again.
cyclezealot is offline   Reply With Quote
Old 04-11-06, 07:05 PM   #17
Bekologist
totally louche
 
Bekologist's Avatar
 
Join Date: Oct 2004
Location: A land that time forgot
Bikes: the ever shifting stable loaded with comfortable road bikes and city and winter bikes
Posts: 18,025
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
here's another pressure measurement - kiloPascals....i have a accu-gage with PSI and kPa's on it...

... anyway, on the dial, 120 PSI is very close to 822 kPa, 155PSI is 1000 kPa's,

90 PSI is 620 kPa's.
Bekologist is offline   Reply With Quote
Old 04-11-06, 07:39 PM   #18
spinbackle
Senior Member
 
spinbackle's Avatar
 
Join Date: Apr 2004
Location: SPS, Texas
Bikes:
Posts: 478
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Whatever happened to the good 'ol thumb and forefinger way of determining tire pressure? In a pinch, it is adequate (provided you still have both of these).
__________________
'84 Trek 850--spinbackle-built, '85 Trek 670 Campy Nuovo Record--project, '87 Trek 560 SS/Fixed--project, '87 Specialized Stumpjumper Comp w/ Deore XT--Specialized-built, '87 Rossin Record, '03 LeMond Wayzata--commuter,
'?? TST Mtn Bike frame--project, '07 Tsunami Tandem--home-built
spinbackle is offline   Reply With Quote
Old 04-16-06, 01:48 PM   #19
orange leader
B-b-b-b-b-b-bicicle Rider
 
orange leader's Avatar
 
Join Date: Apr 2005
Location: Northfield, MN
Bikes: 1997, stumpjumper S-works hardtail, Medici, Giant allegre (track dropouts and fixed gear), Columbia twosome, schwinn twinn, '67 raleigh 5 speed internal hub, Old triumph 3 speed, old BSA 3-speed, schwinn Racer 2spd kickback, Broken raysport criteriu
Posts: 739
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Conversions

go to google, type in "air pressure conversion", or somethin like that and you'll get links to pressure conversions, in europe i'd guess your tires/pump would probably be in pascales (kpa = kilo-pascal) but i'd have to see what your tire says to give you the correct version. for these sites, you type in the unit from and the unit to and from 100 psi to...._____kpa and the converter fills in the blank for you. You don't even need a calculator. good luck. by the way tpi is not a tire pressure it is "threads per square inch", which has to do with tire construction, and is like the threads count on your bedroom sheets.
orange leader is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 11:33 AM.