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  1. #1
    Pro Paper Plane Pilot wunderkind's Avatar
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    Should I commute with this?

    I am cross posting to get max. input prior to resuming my commute tomorrow. Basically I got a flat today. I had to put in a 1.25" tube in a tire that is rated for 26X1.5. Should I ride tomorrow to work? Is it safe?

    1.25" tube in a 1.5" tire width
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  2. #2
    Senior Member dan42's Avatar
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    You are good to go!
    The tube will be fine. Enjoy your commute.

  3. #3
    Pro Paper Plane Pilot wunderkind's Avatar
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    huh really? sure it won't go KABOOM? I have a 15km ride in.
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  4. #4
    Senior Member dan42's Avatar
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    It won't go KABOOM but it might catch fire. Seriously though it should be fine.

  5. #5
    Subjectively Insane MilitantPotato's Avatar
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    Slightly narrower is a good thing IMO. Reduces the chance you'll pinch a tube between the rim and tire. My emergency tubes are all smaller then the tires I use them in. If I'm in a hurry I'd rather not have to be super careful making sure I didn't pinch a tube. A 20" tube can be fit a 26+ wheel (with a bit of muscle) and inflated enough to be usable in a pinch btw.
    You've got a bike, so you gotta move.

  6. #6
    Senior Member DX Rider's Avatar
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    In the words of the Harris Cyclery webmaster, tubes are stretchy. As long as the tire is correctly mounted around the tube, it will prevent the kaboom of which you speak. Due to the material that the tire is comprised being alot stronger than the material that the tube is made with.

    In a pinch, I've used off sized tubes in tires before with no problem.
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  7. #7
    Pro Paper Plane Pilot wunderkind's Avatar
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    Great! I rode in today. So far so good. I didn't ride too fast though. Just want to be careful a bit. I might swap the tire/tube with the front. Less weight put on there.
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  8. #8
    member. heh. lambo_vt's Avatar
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    As long as there's no carbon fiber on your bike you should be fine.

  9. #9
    Senior Member d2create's Avatar
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    it's fine.
    ride it like you stole it.
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  10. #10
    Senior Member Kojak's Avatar
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    Unless it is a tube made of incredibly inflexible material (highly doubtful that this is the case) you'll be fine.
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  11. #11
    Pro Paper Plane Pilot wunderkind's Avatar
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    Quote Originally Posted by lambo_vt View Post
    As long as there's no carbon fiber on your bike you should be fine.
    no... but it was cleaned with micro fiber cloth.
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  12. #12
    Senior Member HuffyMan's Avatar
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    Just try inflating a tube outside of the tire. You can pump it up to double or triple the rated diameter and leave it overnight if you want some reassurance. I do this to test out my patches.
    Some humans would do anything to see if it was possible to do it. If you put a large switch in some cave somewhere, with a sign on it saying "End-of-the-World Switch. PLEASE DO NOT TOUCH," the paint wouldn't even have time to dry
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  13. #13
    member. heh. lambo_vt's Avatar
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    Quote Originally Posted by wunderkind View Post
    no... but it was cleaned with micro fiber cloth.
    My condolences...


  14. #14
    ride for a change modernjess's Avatar
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    I think you've gotten your answer

  15. #15
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    Everything is fine, except the idea that if it were unsafe, you should switch that tube to the front. Danger Danger
    Live simply so others may simply live

  16. #16
    Senior Member igknighted's Avatar
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    Quote Originally Posted by Andreasaway View Post
    Everything is fine, except the idea that if it were unsafe, you should switch that tube to the front. Danger Danger
    +1

    If you get a flat, you want it in the back. A flat in the back is annoying, but hardly a risk of losing control. A flat up front at the wrong time could be disaster.

    As for the tube, as long as the wheel diameter is right (26"), don't worry about it. Thousands of cyclists do this every day, including many racers (its lighter!), and if they get flats it isn't the tube that is the issue. If I were you I'd be more concerned about getting food poisoning from your breakfast than that tube.
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  17. #17
    FNG destikon's Avatar
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    I tried putting a 700X23 tube in a 32mm tire. It was my only choice at the time and It didn't go well. But with your current situation I'd say you will be just fine.
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  18. #18
    Pedaled too far. Artkansas's Avatar
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    From experience, I would you suggest that your flat kit include a spare tube as well. I had to run an undersized tube for a while and all went well till I got a flat.

    I found that the tube was unpatchable because it had to stretch so much to fill the tire, that no patch would stay. But as a temporary measure, the smaller tube will work fine.
    "He who serves all, best serves himself" Jack London

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