Tube blew up just from bike standing still.
11-13-16, 09:32 PM
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Tube blew up just from bike standing still.
Anyone had anything like that happen? Watching TV, bike next to, suddenly I hear a loud burst of air (startled me lol). Tube burst out of nowhere. Max psi for the tires is 120 and it was at 105. Thoughts on what caused it? Just so I know for future.
11-13-16, 09:42 PM
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Most likely pinched. Had you recently installed the tire or inflated it?
11-13-16, 09:45 PM
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I posted a similar thread about a year ago. Happened to me too - both tires over a 3 day period. My conclusion was that I possibly used tubes that were a bit too thin for the tire size.
11-13-16, 10:16 PM
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Had something similar a few weeks ago. Pressure within spec, no weight on the bike, and the sidewall of the tire blew out for no #$%$|#$` reason. Defective manufacture. I will not be buying those tires again. The ones already on my bikes are going away as well. Could have been real bad had it happened on a downhill, or around a hard curve etc. Don't trust any of this make model anymore, or really the brand.
11-13-16, 10:18 PM
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Standing blowouts usually occur after the tire has been remounted improperly after a flat.
Need to be sure that the innertube is *Completely Inside* the tire. Otherwise the small portion of tube that is trapped on the wrong side of the tire bead will slowly (minutes, sometimes hours later) wedge the bead out enough to protrude outside the tire, where it then blows out.
/
Need to be sure that the innertube is *Completely Inside* the tire. Otherwise the small portion of tube that is trapped on the wrong side of the tire bead will slowly (minutes, sometimes hours later) wedge the bead out enough to protrude outside the tire, where it then blows out.
/
11-13-16, 10:30 PM
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Yeah I had that happen to me on a specialized tube at 70lbs psi only 2 or 3 days after installing it. When I removed the tube it turns out I had slightly pinched it between the rim and it built up a kind of bubble where it got pinched. I've installed many bike tubes in my life and never had that happen but guess I was just in a rush when changing my tube on the side of the road where I blew out two tubes when I hit some rocks I didn't see! What do people think of rim liners that suposidly help prevent punctures? Has anyone used them and find them effective or not good? I ask because I've never have tried using them.
11-13-16, 11:42 PM
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That's happened to me a couple of times the past year.
The first time, I didn't seat the bead properly and check it before fully inflating the tire. The tube sneaked out between the bead and rim and burst -- loudly. My cats didn't come out for hours.
Since then I double and triple check to be sure the bead is seated, gradually inflating the tire in steps: around 15-20 psi, check the bead; inflate little more, check again, etc.
The second time, last week, also indoors, there was a small pop and a hiss as the tire went flat. Turned out to be the fault of a rubber rim strip that was too thin for the double wall rim. Over a period of months since the new wheel was installed, with fresh rim strip and tube, the tube pressure gradually extruded along with the thin rubber rim strip into the spoke nipple holes. There were multiple extruded areas where the tube had thinned out under pressure over several months. When I checked with a magnifying glass I saw several tiny cracks over extruded areas, so the tube was about to split in multiple places.
I've since replaced the rim strip with thicker Velox cloth tape. Some folks recommend more than one rim strip for double wall rims like this. We'll see how it goes.
The first time, I didn't seat the bead properly and check it before fully inflating the tire. The tube sneaked out between the bead and rim and burst -- loudly. My cats didn't come out for hours.
Since then I double and triple check to be sure the bead is seated, gradually inflating the tire in steps: around 15-20 psi, check the bead; inflate little more, check again, etc.
The second time, last week, also indoors, there was a small pop and a hiss as the tire went flat. Turned out to be the fault of a rubber rim strip that was too thin for the double wall rim. Over a period of months since the new wheel was installed, with fresh rim strip and tube, the tube pressure gradually extruded along with the thin rubber rim strip into the spoke nipple holes. There were multiple extruded areas where the tube had thinned out under pressure over several months. When I checked with a magnifying glass I saw several tiny cracks over extruded areas, so the tube was about to split in multiple places.
I've since replaced the rim strip with thicker Velox cloth tape. Some folks recommend more than one rim strip for double wall rims like this. We'll see how it goes.
11-13-16, 11:48 PM
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Either the tire bead slipped or the tube was pinched. You should be able to tell where the bead let go - that's where the tube peaked out.
11-14-16, 07:29 AM
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Is the pressure gauge on your pump accurate? Was the bike just ridden on a hot street? Could the rim over heated because of a lot of down hill braking?
11-14-16, 07:34 AM
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Standing blowouts usually occur after the tire has been remounted improperly after a flat.
Need to be sure that the innertube is *Completely Inside* the tire. Otherwise the small portion of tube that is trapped on the wrong side of the tire bead will slowly (minutes, sometimes hours later) wedge the bead out enough to protrude outside the tire, where it then blows out.
/
Need to be sure that the innertube is *Completely Inside* the tire. Otherwise the small portion of tube that is trapped on the wrong side of the tire bead will slowly (minutes, sometimes hours later) wedge the bead out enough to protrude outside the tire, where it then blows out.
/
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11-14-16, 08:12 AM
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we used to unmount/remount the tires on a new bike to true the wheels. Assuming the OP has never had a flat, this is when the problem happened. Usually it doesn't take a couple of weeks, but I could see that happening
I'm sure gsa103 meant that the tube had been pinched between the tire and rim, not a pinch flat.
I'm sure gsa103 meant that the tube had been pinched between the tire and rim, not a pinch flat.
Last edited by unterhausen; 11-14-16 at 08:33 AM.
11-14-16, 08:36 AM
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Tube is Pinched.
Had two do that in my office.
and this on a tour
Had two do that in my office.
and this on a tour
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11-14-16, 09:16 AM
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Have you looked at the tube and tried to figure out what happened, based on the where the tear/puncture is?
11-14-16, 09:59 AM
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Btw, I showed the shop the tube with it's pinch flat characteristic star splits and they would not give me a new tube. They no longer get any repair business from me.
This was definitely a case of the tube having been trapped underthe tire.
Cheers
Last edited by Miele Man; 11-14-16 at 10:02 AM. Reason: Added comment
11-14-16, 10:01 AM
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11-14-16, 10:16 AM
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Could also be a spoke if you have single wall rims. Happened to me a week ago. Had ridden on it and it was fine for a 30 miler, let it sit awhile, pumped it up and it started leaking air about 5 minutes later. Found a good puncture hole in it after I pulled it off. Need to get actual rim tape for those wheels
11-14-16, 10:48 AM
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If the tire goes back on the rim very easily, suspect a broken bead. Otherwise, the next time you install, mount the tire and tube, then inflate the tube to 5 psi and go all the way around both sides of the tire, pushing the tire away from the rim and verifying you don't see the tube. Only after making that safety check should you fully inflate.
11-14-16, 02:53 PM
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I don't call that a "pinch". It's an incorrectly mounted tire and the pressure can push the tire off the bead but the tube isn't "pinched".
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11-14-16, 03:33 PM
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actually, it can get pinched between the tire and rim. That's why sometimes it takes a long time before it blows. What would be your word choice for that scenario?
11-14-16, 06:17 PM
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Hi all,
I had been riding it like that for 2 weeks, and the person who I bought it from was riding it like that for even longer, so I don't think it was an issue of something installed wrong or pinched. I changed the tube, and this one had a hole (not by the stem), on the center area of the tube. I think it was just an old tube and the life finally gave out of it. replaced it
I had been riding it like that for 2 weeks, and the person who I bought it from was riding it like that for even longer, so I don't think it was an issue of something installed wrong or pinched. I changed the tube, and this one had a hole (not by the stem), on the center area of the tube. I think it was just an old tube and the life finally gave out of it. replaced it