1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Pressure loss in tubed tyres with CO2

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

  1. labougie

    labougie New Member

    Location:
    Surbiton
    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.
     
  3. OP
    OP
    labougie

    labougie New Member

    Location:
    Surbiton
    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.
     
    NickNick likes this.
  4. arch684

    arch684 Über Member

    ^^this and when you get home deflate the tyre and fill it with air
     
    jay clock, NickNick and Gary E like this.
  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:
     
    Saluki, cyberknight, Boon 51 and 2 others like this.
  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.
     
    NickNick likes this.
  7. andrew_s

    andrew_s Veteran

    Location:
    Gloucester
    If you've got a road bike, get high pressure
     
    raleighnut and NickNick like this.
  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
     
  9. OP
    OP
    labougie

    labougie New Member

    Location:
    Surbiton
    Thanks for all the input, guys - I'm sound.
     
    raleighnut likes this.
  10. froze

    froze Active Member

    I'm an odd duck on this one, fine, I'm just plain odd, anywho, I don't advocate CO2 unless your racing otherwise you don't need it. Why use CO2 air that cost money when a simple bike mounted pump uses free air? Why go through the effort of filling a tube with CO2 only to go home and drain all the air out and fill with a pump? that's twice the work. Why dispose of unnecessary waste? Of course when it comes to throwing those carts out you can do what a lot of CO2 users do and that is simply throw it discreetly along side the road...
     
    Dogtrousers and Saluki like this.
  11. screenman

    screenman Legendary Member

    You do know of course who throws most of those containers away.
     
    raleighnut likes this.
  12. keithmac

    keithmac Über Member

    And they haven't had CO2 anywhere near them..
     
    raleighnut likes this.
  13. vickster

    vickster Legendary Member

    Maybe you mean a bike?
     
    keithmac likes this.
  14. SkipdiverJohn

    SkipdiverJohn Well-Known Member

    Location:
    London
    Most of those discarded canisters are Nitrous Oxide, not CO2. My local area is awash with the things. The local chavs inhale them like the 21st century equivalent of glue sniffing, then they drop the empty containers everywhere. Very dangerous as an old person could easily slip over on one of those things rolling about on the pavement.
     
    Paulus, palinurus and keithmac like this.
  15. Hacienda71

    Hacienda71 Mancunian in self imposed exile in leafy Cheshire

    Location:
    Wilmslow, Cheshire
    Up in the peak district, with high winds and subzero temperatures the ease of blowing up a tube to 100psi in a split second is why I carry C02 as well as a pump. I don't want to standstill for any longer than necessary.
    Agree with the others about the nitrous oxide canisters being the dumped ones you see a lot. Apart from the odd idiot most cyclists seem to take there stuff with them