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Thread: Compressed air cylinders - how many?

  1. #1
    George K1200RS GeorgeK1200RS's Avatar
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    Compressed air cylinders - how many?

    I have been carrying a tire repair kit with compressed air cylinders for more than 11 years. Fortunately never had to use it...tubeless tires seem to be built better than older tube styles.

    Two questions regarding the little cylinders

    1. Do these things have a shelf life?

    2. How many are needed to pump up a plugged flat?

    Always carried a spare tube with my airheads...had more than 6 flats over the years on those bikes.
    George
    R1200RT, K1200RS. Previous K1200LT, R80RT, R100R, R75/5

  2. #2
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    I used 3 cylinders to get the rear tire up high enough to make it to a gas station on my CLC. Those are the big BMW's with the huge rear tire. I believe the cannisters are only for getting you to a better air supply so you can bring it up to snuff. 'Don't know about shelf life.

  3. #3
    IBA #44567 Ken F's Avatar
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    yes, three will inflate your tire.

    Better solution is to carry a 12v. mini-air compressor.
    you can get from just about any auto supply store made by Slime which is about $40.
    Really handy for blowing up air matresses too!

    Ken
    IBA #44567
    "Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe."
    -Albert Eienstein

  4. #4
    Left Coast Rider
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    Quote Originally Posted by GeorgeK1200RS View Post
    Two questions regarding the little cylinders

    1. Do these things have a shelf life?

    2. How many are needed to pump up a plugged flat?
    1. Probably not but if in doubt, replace them. Guaranteed you'll need them the day after all the compressed air leaks out.

    2. Three

    I've also bought on of those compact air pumps I can plug into my accessory socket. Has helped me be the Good Samaritan twice!

  5. #5
    Registered User 39520's Avatar
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    The little pumps are handy. On some of them you can remove the plastic housings to make them a little smaller to pack. I have a Slime, but I expect most of them are adequate. I carry the cylinders as a backup to the pump.

  6. #6
    George K1200RS GeorgeK1200RS's Avatar
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    Thanks

    Thanks to all for the info about the air cylinders.

    For a lot of local riding, I prefer not to use the hard bags on the K1200RS. My tire repair kit fits nicely under the seat. My kit is Plug and Go mushrooms, sticky rope repair, BMW plugs and air cylinders...I like redundancy.

    I've had enough flats in 35+ years of riding and they almost always happen in the worst possible places.

    All this takes up about the same amount of space that a spare tube and tire irons formerly consumed.

    When the bags are on, a 12 volt air pump is in the saddlebag along with extra gloves and foul weather gear.

    I will pick up some fresh air cylinders just to make sure I have enough to do the job.

    Thanks again
    George
    R1200RT, K1200RS. Previous K1200LT, R80RT, R100R, R75/5

  7. #7
    Registered User David13's Avatar
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    I'm going to recommend the little 12v pumps.
    The hand jobs are insane. Figure about 1200 pumps to get to about 30 pounds.
    The cylinders of CO2 I don't trust at all.
    The last post, just this week that I saw about it said 11 cylinders, to get to 20 pounds.
    dc

  8. #8
    It's a way of life! oldnslow's Avatar
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    Funny you ask, as I was wondering the same thing. I tested mine just a few days ago. Completely empty (removed and replaced valve stem) 100/90 front tire. One canister, from 1985, gave it 19psi. Took about 2 seconds to empty the cannister! I guess a guy could limp along on 19psi until he found an air source. I carry 6 cans with me. I have the 'BMW' hose thingy fill tube and just bought a "Moose" brand filler/adapter. THe Moose brand worked perfectly!
    Mike Davis
    "Old n Slow" It's a way of life!
    1985 K100RT

    1998 R1100RT

  9. #9
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    Quote Originally Posted by David13 View Post
    I'm going to recommend the little 12v pumps.
    The hand jobs are insane. Figure about 1200 pumps to get to about 30 pounds.
    The cylinders of CO2 I don't trust at all.
    The last post, just this week that I saw about it said 11 cylinders, to get to 20 pounds.
    dc
    frankly, the guy that used 11 cartridges was incompetent at that job. it should not take more than 3.
    with that said, i carry an electric pump.
    Ride Safe, Ride Lots

  10. #10
    not so retired henzilla's Avatar
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    I carry a pump on most bikes, but a few are C02 kits. Not much room on the naked S's.

    I went to the local bicycle shop and got a better adapter than the BMW hose. They have a small unit that screws on threaded cartridges or a larger one that takes either threaded or non-threaded . Both styles have a push button or a lever to only gas when you are ready...a big plus!

    With that set up you can get it all done with 3...at least enough to get you to a real pump!

    On shelf life, they seem to last a L-O-N-G time...I had several from an old Benjamin air projectile emitter about fifteen years old...still OK
    Steve Henson
    SABMWRA MOA Club#62's Flat Fixer/ current forum moderator
    It's not the breaths you take, but the moments that take your breath away-D.Dillon/G. Strait

  11. #11
    Registered User David13's Avatar
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    Shoulda coulda woulda take only 3.
    Why bother when the pump is $10. If it works 2 or 3 times, it was worth it.
    dc

  12. #12
    Cam Killer marchyman's Avatar
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    Quote Originally Posted by oldnslow View Post
    One canister, from 1985, gave it 19psi.
    One canister of what size? 8 gm? 12 gm? 16 gm? 25 gm? 88 gm? They come in a variety of sizes.

  13. #13
    It's a way of life! oldnslow's Avatar
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    Quote Originally Posted by marchyman View Post
    One canister of what size? 8 gm? 12 gm? 16 gm? 25 gm? 88 gm? They come in a variety of sizes.
    16gm.
    Mike Davis
    "Old n Slow" It's a way of life!
    1985 K100RT

    1998 R1100RT

  14. #14
    It's a way of life! oldnslow's Avatar
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    Oh yeh, wear gloves! The cylinder turned frost bite cold as soon as the gas was released! YOW!
    Mike Davis
    "Old n Slow" It's a way of life!
    1985 K100RT

    1998 R1100RT

  15. #15
    Registered User David13's Avatar
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    Frost bite cold? Well, what's that, reason number 14 or 16 to not use those?
    I could see if electricity had not yet been invented.
    Where does it say "Put gas in your tires?"
    I thought it was supposed to be air.
    What next? Nitrogen?
    dc

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