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I bought a new inner tube and when I tried to inflate it, the tube got unevenly inflated (check picture). This is the first time I'm installing a tube by myself so I don't know if this is normal. Do you think this is this a production defect, or did I do something wrong while pumping the tube? Can I fix it by myself?

enter image description here

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    Normal. They are not designed to be inflated without a tire around them. Just use it.
    – andy256
    Oct 24 '15 at 3:24
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    Yes you did something wrong. You are supposed to put the tube in the tire and mount it on the rim.
    – paparazzo
    Oct 24 '15 at 3:29
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    Yep, perfectly normal, if you over-inflate it that much. The tube is not designed to hold pressure by itself, and will rarely allow more than about 5psi without ballooning out like that. Oct 24 '15 at 3:57
  • Okay all great, thanks. Now can somebody put this as a proper answer instead of comments so that I accept it?
    – Andree
    Oct 24 '15 at 4:02
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Yes you did something wrong. You are supposed to put the tube in the tire and mount it on the rim.

If you inflate a balloon you will see similar behavior. After you have stretched a tube IN the tire the behavior outside the tire will change slightly.

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  • Andy you down voted. Why?
    – paparazzo
    Oct 24 '15 at 5:08
  • It's a duplicate. Surely you would know that. New users don't learn to use the site as it's supposed to work if senior users such as yourself feed contrary behaviour.
    – andy256
    Oct 24 '15 at 6:52
  • @andy256 Feed contrary behavior? By that logic your first comment without marking as a duplicate feed contrary behavior.
    – paparazzo
    Oct 24 '15 at 10:46
  • A comment is not an answer. I was on my phone and not able to check for duplicates at the time.
    – andy256
    Oct 24 '15 at 11:08
  • @andy256 Still a feed. Cheers. I hope the OP learned his/her lesson.
    – paparazzo
    Oct 24 '15 at 11:22

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