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Testing new tubes

Old 09-23-08, 02:38 PM
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Widsith
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Testing new tubes

Just curious; do you folks test new tubes by inflating them at all before you use them?

I just bought a couple of new tubes to use as spares. They came factory-sealed in fairly tough plastic bags and I'd like to leave them that way until I use them. But I definitely wouldn't like to be on the road somewhere with a busted tube, put in a new one, and find out it leaks around the valve stem or has some other problem. I've bought and and used three other tubes of the same brand in the last few months, and they all were fine right out of the box. So should I trust that these are going to be good too, or should I open the packages and put in a few pounds of air to see if they leak before trusting them? I suppose that even if one is bad, the chances of both having a problem would be much smaller, so is carrying both unopened an acceptable compromise?
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Old 09-23-08, 02:39 PM
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Nope, sure don't. I have faith.
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Old 09-24-08, 12:10 AM
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I do OJT (On the Job Testing)
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Old 09-24-08, 12:50 AM
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Never pretested any of them yet and so far no on the road dissapointments with any new ones.
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Old 09-24-08, 07:06 AM
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I have never found a leak in a new tube after literally hundreds and hundreds and hundreds (maybe thousands) of flat changes.

I have heard a few customers complain that a tube had a hole at installation, but every single one has pinched the tube with a tire iron on installation.
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Old 09-24-08, 07:48 AM
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Originally Posted by LarDasse74 View Post
I have never found a leak in a new tube after literally hundreds and hundreds and hundreds (maybe thousands) of flat changes.

I have heard a few customers complain that a tube had a hole at installation, but every single one has pinched the tube with a tire iron on installation.
That's what I think too. I suppose that it's possible to get a pre-punctured tube just as it's possible for any new product to be defective in some way. I also know, however, that it's 100's of times more likely that any new leaky tube was due to operator error during installation.
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Old 09-24-08, 08:36 AM
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It seems the consensus is that the likelihood of a new tube being bad is so small as to not be worth worrying about it. That's what I was hoping to find, but I appreciate hearing it from those with more experience than mine. Thanks, everyone!
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Old 09-24-08, 10:30 AM
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if you store your new tubes around caustic chemicals or heat or sharp objects--- check your tubes....... if you drink this early in the morning, Heny and tea....
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Old 09-24-08, 12:23 PM
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I thought that the probability of getting a defective tube was vanishingly small until this summer. I got one defective tube, from a major brand. The probability is still very, very small. My problem tube had not one but at least two open areas (holes). I patched the first hole I saw and when it still didn't hold air (at all) I tossed it.

-soma5
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Old 09-24-08, 05:58 PM
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Originally Posted by Widsith View Post
Just curious; do you folks test new tubes by inflating them at all before you use them?
Waste of time.
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Old 09-24-08, 08:50 PM
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I have definitely seen defective new tubes, right out of the box, but not the brands that I use now.
I've had tubes deteriorate and develop holes while stored in my garage. These have been new and patched used tubes. Now I store new tubes inside my house where they seem to last forever.
I've learned to wrap tubes that go in my bikes' tool bags with kitchen wrap. This protects them from whatever it is in my garage that attacks tubes (I suspect ozone).
When I patch a tube that I plan to re-use I test it under water then fold are and wrap it after it has dried.

Al
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Old 09-24-08, 11:27 PM
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I just checked a tube, but that is only because I plunged a box cutter in that box before I realized I had stored my tubes in there.
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