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  1. #1
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    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.

  2. #2
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    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.

  3. #3
    Triathlon in my future??? flip18436572's Avatar
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    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
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  4. #4
    DRF aka Thrifty Bill wrk101's Avatar
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    +1 small leak. Check tire and rim strip carefully before going through several tubes....

  5. #5
    Senior Member deraltekluge's Avatar
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    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?

  6. #6
    Banned. Mr. Beanz's Avatar
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    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!

  7. #7
    Senior Member deraltekluge's Avatar
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    When you're checking for bubbles, don't forget to look at the valve.

  8. #8
    Banned. Mr. Beanz's Avatar
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    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!

  9. #9
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    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.

  10. #10
    Triathlon in my future??? flip18436572's Avatar
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    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
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    2000 Specialized Hardrock (bought used)
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