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Pressure loss in tubed tyres with CO2

Discussion in 'Beginners' started by labougie, 13 Nov 2017.

  1. labougie

    labougie New Member

    Just bought a Raleigh Bob with flat tyres. Inflated with CO2, but a week later, they were almost flat again. So, bought new tubes and swapped over - checked the old tubes with a little pressure from a hand pump and a full sink but couldn't find a leak. When I filled the new tubes I put some hand pumped air in first because a 16oz cartridge didn't quite get a 26"x2" hard enough, finished off with a cartridge per wheel and two days later they're noticeably softer again.

    I did read that there's more leakage through a butyl inner tube wall with CO2 but is that REALLY enough to noticeably soften a tyre in 2 days?
     
  2. PhilDawson8270

    PhilDawson8270 Veteran

    Co2 is a convenient get me home.

    It’s not for long term usage.
     
    • Like Like x 2
  3. OP
    OP
    labougie

    labougie New Member

    Right - I hadn't realised that - that's why the message was in the "Beginners" section!

    Thanks - I'll get one of those double foot pumps.
     
    • Like Like x 1
  4. arch684

    arch684 Über Member

    ^^this and when you get home deflate the tyre and fill it with air
     
    • Like Like x 3
  5. Hacienda71

    Hacienda71 Mancunian in self imposed exile in leafy Cheshire

    Location:
    Wilmslow, Cheshire
    Don't get a foot pump, get a track pump, much much better. :okay:
     
    • Like Like x 2
  6. raleighnut

    raleighnut Guru

    Location:
    On 3 Wheels
    2nd vote for a track pump but be aware there are 2 types, high volume or high pressure, if you're on 2" tyres you want a high volume one.
     
    • Like Like x 1
  7. andrew_s

    andrew_s Veteran

    Location:
    Gloucester
    If you've got a road bike, get high pressure
     
    • Like Like x 2
  8. CO2 is for getting you home after a puncture. It leaks because (I think!) has smaller molecules so escapes from the rubber tube.

    So, use CO2 to get home after a puncture. When home fully deflate tyre then fill up with air and a track stand is ideal
     
    • Like Like x 3
  9. OP
    OP
    labougie

    labougie New Member

    Thanks for all the input, guys - I'm sound.
     
    • Like Like x 1