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Can't find the puncture hole.

  • 26-05-2022 9:47pm
    #1
    Terry
    Registered Users, Registered Users 2 Posts: 26,061 ✭✭✭✭


    So I slowly ran the tube through the kitchen sink 5 times, and couldn't see any air bubbles.

    Tried holding the valve under for about 30 seconds too, and nothing.

    It's a second-hand bike. I know this because of the dirt on the tube (not my bike, just doing a favour), but there are no patches on the tube, so that's obviously new.


    Anyone know what the craic is here.

    The valve is one of the really skinny ones.



Comments

  • #2
    niallb
    Registered Users, Registered Users 2 Posts: 2,747 ✭✭✭niallb


    How much pressure did you have in the tube when you held it under?



  • #3
    cletus
    Registered Users, Registered Users 2 Posts: 8,049 ✭✭✭cletus


    Buy a new tube for a fiver...



  • #4
    ted1
    Registered Users, Registered Users 2 Posts: 23,648 ✭✭✭✭ted1


    Buy a new tube, but if you can’t see bubbles you are either not squeezing it. Or it the nozzle , put it under abs the move



  • #5
    [Deleted User]
    Posts: 0 ✭ [Deleted User]


    This maybe? I haven't had this in 20 odd years though and it was my Dad's bike back then when it happened.

    https://www.youtube.com/watch?v=C7XzK0p_03o




  • #6
    JMcL
    Registered Users, Registered Users 2 Posts: 2,271 ✭✭✭JMcL


    How quickly is it going down? I've always found even the slowest punctures can be found by holding the tube under water - including air leaking from the valve. I usually use a basin and make sure it's in good light. For very slow punctures it might take a couple of rounds - slide your hand along the tube while underwater to clear away any air bubbles sticking to it, then hold each section under for a few seconds. Also try inflating it a bit more



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  • #7
    tomasrojo
    Registered Users, Registered Users 2 Posts: 11,800 ✭✭✭✭tomasrojo


    Yeah, make sure to stick the valve under the water too, as said. You could try inflating the tube a bit more, as also said, as some small punctures remain closed at low pressure.



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