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


Go Back   > >

Clydesdales/Athenas (200+ lb / 91+ kg) Looking to lose that spare tire? Ideal weight 200+? Frustrated being a large cyclist in a sport geared for the ultra-light? Learn about the bikes and parts that can take the abuse of a heavier cyclist, how to keep your body going while losing the weight, and get support from others who've been successful.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 10-16-08, 07:39 PM   #1
sourdoughT
Senior Member
Thread Starter
 
Join Date: Feb 2008
Bikes:
Posts: 118
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Back tire losing air pressure faster than front tire.

I recently got a 64 cm cyclo - cross bike with 700 x 30 mm tires and notice the rear tire always loses air pressure first. I'm just wondering if this is the nature of the beast called bicycling or if perhaps a different tire and inner tube arrangement would slow it down, I'm putting in 20 - 25 psi into the the back tire a day with a frame type pump and I'm considering of hauling a floor type pump wherever I go because it would be faster to use.
Got any ideas besides get used to it, which I am.
sourdoughT is offline   Reply With Quote
Old 10-16-08, 07:50 PM   #2
JoelS
Senior Member
 
Join Date: Jun 2008
Location: Near Sacramento
Bikes:
Posts: 4,890
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Check the tubes for small holes, then check the inside of each tire for something that might have made the hole. That's a lot of air to be loosing overnight.
__________________
-------

Some sort of pithy irrelevant one-liner should go here.
JoelS is offline   Reply With Quote
Old 10-16-08, 08:32 PM   #3
flip18436572
Triathlon in my future???
 
flip18436572's Avatar
 
Join Date: Jun 2007
Location: Southwest Iowa
Bikes: Junk, that is why I am here. :-)
Posts: 2,193
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I loose some air in a week, but never that much in a week, let alone a day. I would assume you have a small leak. I would replace the tube, and check for something inside of the tire causing the problem.
__________________
2007 Jamis Ventura Comp
2006 Jamis Explorer 2.0
2000 Specialized Hardrock (bought used)
Swim, Bike, Run and sounds like fun
flip18436572 is offline   Reply With Quote
Old 10-16-08, 08:49 PM   #4
wrk101
DRF aka Thrifty Bill
 
wrk101's Avatar
 
Join Date: Jan 2008
Location: The NC Mountains
Bikes: 86 Katakura Silk, 87 Prologue, 87 Cimarron, 14 frame school custom, 73 Paramount
Posts: 19,976
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
+1 small leak. Check tire and rim strip carefully before going through several tubes....
wrk101 is offline   Reply With Quote
Old 10-16-08, 08:55 PM   #5
deraltekluge
Senior Member
 
deraltekluge's Avatar
 
Join Date: Sep 2006
Bikes: Kona Cinder Cone, Sun EZ-3 AX
Posts: 1,195
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Whatever...the two tires ought to be losing pressure at about the same rate when inflated to the same starting pressure. How fast does the front tire lose?
deraltekluge is offline   Reply With Quote
Old 10-16-08, 09:06 PM   #6
Mr. Beanz
Banned.
 
Mr. Beanz's Avatar
 
Join Date: Dec 2005
Location: Upland Ca
Bikes: Lemond Chambery/Cannondale R-900/Trek 8000 MTB/Burley Duet tandem
Posts: 20,030
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
It will happen over and opver if you don';t find the little buger causing the slow leak. Even if install a new tube!

Use the tire label as a reference. Find the hole in th etube then trace the tire back to the culprit. Many time a very small grain of glass causes that symptom.

Same airloss syndrome has happened to me several times. Taek the tube out, fill with air and inspect in water for the little bubbles. Then patch it, replace in tire.

A new tube does not solve the problem. A couple of rides with the new tube, it will suffer the same illness if you don't remove the sucker causing the problem!
Mr. Beanz is offline   Reply With Quote
Old 10-16-08, 09:24 PM   #7
deraltekluge
Senior Member
 
deraltekluge's Avatar
 
Join Date: Sep 2006
Bikes: Kona Cinder Cone, Sun EZ-3 AX
Posts: 1,195
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
When you're checking for bubbles, don't forget to look at the valve.
deraltekluge is offline   Reply With Quote
Old 10-16-08, 09:42 PM   #8
Mr. Beanz
Banned.
 
Mr. Beanz's Avatar
 
Join Date: Dec 2005
Location: Upland Ca
Bikes: Lemond Chambery/Cannondale R-900/Trek 8000 MTB/Burley Duet tandem
Posts: 20,030
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by deraltekluge View Post
When you're checking for bubbles, don't forget to look at the valve.
I knew a gal named Bubbles, but that's a different thread!
Mr. Beanz is offline   Reply With Quote
Old 10-16-08, 11:13 PM   #9
bmorey
Senior Member
 
Join Date: Jul 2007
Location: Melbourne, Australia
Bikes: Giant CRX
Posts: 224
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I had a 3 day slow leak that turned out to be the neck of the Presta valve, which I had damaged removing the pumphead.
bmorey is offline   Reply With Quote
Old 10-17-08, 04:48 AM   #10
flip18436572
Triathlon in my future???
 
flip18436572's Avatar
 
Join Date: Jun 2007
Location: Southwest Iowa
Bikes: Junk, that is why I am here. :-)
Posts: 2,193
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Mr. Beanz View Post

A new tube does not solve the problem. A couple of rides with the new tube, it will suffer the same illness if you don't remove the sucker causing the problem!

That is why I said check the tire for the problem. I usually don't patch, because the patch fails over time, and usually if I have a tube problem, it is a major one, so a patch wouldn't help me with my 23's. On bigger tubes I will patch, if it is something small, but even then, I usually replace with a new tube, and then keep the patched tube as a spare, once I know it holds air well.
__________________
2007 Jamis Ventura Comp
2006 Jamis Explorer 2.0
2000 Specialized Hardrock (bought used)
Swim, Bike, Run and sounds like fun
flip18436572 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 03:12 AM.