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Thread: Flat tire help

  1. #1
    mtbr member
    Join Date
    Jun 2011

    Flat tire help

    Was about to head out for ride and noticed my front tire was very low on pressure…maybe 10psi, figured I had a slow leak.
    Took the tube out and fill it with air…like 25psi, but I don’t see/hear any signs of a leak! 12 hours later and the tube is
    Still inflated at 25psi. I’m confused now….do I have a leak or not???

  2. #2
    Reputation: willrace4food's Avatar
    Join Date
    Jan 2009
    probably not, tubes lose air over time. best to check the pressure before every ride.

  3. #3
    mtbr member
    Join Date
    Aug 2010
    Sometimes the valve leaks and then when you disturb them to air it up, they reseal. Or someone was messing with your bike, like my kids do sometimes. They like to let the air out of my shock and then I think it has a leak.

  4. #4
    mtbr member
    Reputation: mtbnozpikr's Avatar
    Join Date
    Sep 2008
    As previously stated, tubes lose air very slowly (depending on thickness or walls, material, and valve). Tubeless tires can lose pressure even faster. There may or may not be a hole and just because you can't hear or see any leak doesn't mean it's not there as some are extremely small and almost impossible to spot. If it's working for you I'd run it but next time you're tube is out, I would inflate it and then put it under water and watch for air. I've had punctures so small I have needed to squeeze to create more pressure to find them.
    2012 Intense M9
    2012 Pivot Mach 5.7 Carbon
    2008 Look 595
    2007 Custom Litespeed Sewanee

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