Exploding inner tubes

[jasonification]

Had an inner tube that mysteriously went flat last night on my wife's bike. Took it out to inspect and had pumped it up and was trying to listen for the hiss when a loud pop happened!

Never seen this before!
#timetogotubeless?

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[Veloo]

Never seen that either. What brand of tube is it?

[jasonification]

Originally Posted by Veloo

Never seen that either. What brand of tube is it?

Pretty sure it's duro

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[Blown Reek]

.

[charliedid]

Oh I've seen it before.

A few different time Kenda and maybe Bontrager tubes that were blowing up at the seam near the valve stem. I recall it happening three times one week. That's a lot getting the **** scared out of you and everyone else in the shop. I HATE that.

[jasonification]

Originally Posted by charliedid

Oh I've seen it before.



A few different time Kenda and maybe Bontrager tubes that were blowing up at the seam near the valve stem. I recall it happening three times one week. That's a lot getting the **** scared out of you and everyone else in the shop. I HATE that.

Totally scared me! I had my ear close to the tube when listening for the hiss. Glad the explosion occurred further down the tube or my ears might've gotten some damage

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[p nut]

The only time that’s happened to me was when I installed a tube and a bit of it got pinched under the bead. I didn’t notice and continued to pump the tire. Went inside and (strangely), later that night....

Kaboom. Sounded like a shotgun. But I could clearly see where the tube blew out as the tire was unseated.

EDIT: OH, the tube was out of the tire. Never mind.

[Louis]

Originally Posted by jasonification

Had an inner tube that mysteriously went flat last night on my wife's bike. Took it out to inspect and had pumped it up and was trying to listen for the hiss when a loud pop happened!

I bet you had a very small hole somewhere, which caused it to lose air. You took the tube out, pumped it up, but the local stress concentration at the hole was too much and you got instant "crack" propagation from the hole and everything blew from there.

[jasonification]

Originally Posted by Louis

I bet you had a very small hole somewhere, which caused it to lose air. You took the tube out, pumped it up, but the local stress concentration at the hole was too much and you got instant "crack" propagation from the hole and everything blew from there.

Probably! Just glad nothing happened when we were riding on Wednesday!

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[Louis]

Originally Posted by jasonification

Probably! Just glad nothing happened when we were riding on Wednesday!

Instant and catastrophic tube failure is highly unlikely if it's fully contained by the tire and wheel, so I wouldn't worry about it. This was a "lab failure" not a real-world event.