Timeline for What might cause an inner tube to "behave" flat in a tire?
Current License: CC BY-SA 4.0
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 7 at 5:12 | vote | accept | Jon Bon | ||
| Jun 20 at 13:50 | comment | added | Suma | Great experiment. No idea why OP wrote that, then. It is stated as a simple fact, with no explanation how the number was obtained. | |
| Jun 20 at 8:17 | comment | added | Chris H | @Suma Ken's right. My test showed a split forming under 10 PSI, when the tube was several times its designed size. If it could somehow get to 50psi without bursting it would be hugely stretched and have to be stuffed into the tyre afterwards | |
| Jun 20 at 6:37 | history | edited | gerrit | CC BY-SA 4.0 |
added SI units
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| Jun 19 at 12:21 | comment | added | Ken Carlson | @suma, I find it hard to believe that a tube can be inflated to 50 PSI outside the constraints of a tire without bursting. | |
| Jun 19 at 12:15 | comment | added | Suma | "you are only getting maybe 1-2 PSI." OP said his tube, when taken outside, "will easily go up to 50 psi". | |
| Jun 19 at 8:25 | comment | added | Chris H | @Peter-ReinstateMonica a habit of lining up the logo on the tyre with the valve stem helps here; even if you flip the tube there are only 2 areas to inspect. I've had punctures at the roadside where finding the thing in the tyre by feel was the only way to track down the hole. But of course there's risk of cutting yourself doing it by feel. So I inspect inside, then outside (one of the many little cuts is likely to be the cause, especially with puncture-protected tyres), then feel inside. Some thorns, bits or wire etc are better pushed/pulled inwards rather than outwards, small pliers help | |
| Jun 19 at 8:21 | comment | added | Chris H | For an indication of pressure in a tube without a tyre, see this answer of mine where I test it. And when dunking, you might need to wipe off bubbles clinging to the tube before checking if new ones form (soapy water can help but I prefer to keep soap off my tubes). | |
| Jun 19 at 8:00 | comment | added | Peter - Reinstate Monica | And then don't forget to look for the little thorn or glass shard embedded in the outer tire. For that, make sure not to rotate the tire relative to the rim; if you do or even take it off, mark the valve position on the tire first. For little holes, the embedded objects can be quite hard to find because they don't poke through much. Inspect visually and tactilely (yes, that word exists ;-) ). Work the tire between your fingers and thumbs both for detection and removal. Last time I needed a needle to get the shard out. | |
| Jun 18 at 22:33 | history | answered | Ken Carlson | CC BY-SA 4.0 |