Ever wondered what happens if you inflate a tyre until it explodes?
12-05-18, 04:50 PM
#26
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There’s a fair bit of talcum inside from the manufacturing process. Odds are it’d have looked about the same even w/o your extra addition.
12-05-18, 04:58 PM
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On an early summer job, I was asked to fix a flat on one of the cargo kickbikes.
Rugged as they were, they were beginning to show signs of ageing regardless.
And airing one up with the most basic compressor nozzle, a ”well-seasoned” tire sidewall blew. Taught me about dry rot and injured my fingers some.
Being in an industrial setting, ear protection was already on. Sometimes one can be thankful of the small things.
Rugged as they were, they were beginning to show signs of ageing regardless.
And airing one up with the most basic compressor nozzle, a ”well-seasoned” tire sidewall blew. Taught me about dry rot and injured my fingers some.
Being in an industrial setting, ear protection was already on. Sometimes one can be thankful of the small things.
12-06-18, 05:51 AM
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Tubes are only meant to provide an air-tight cavity, and rely on the tire for structural strength. Puncture-resistant or not, outside the constraints of a tire they will stretch unevenly to resemble a cartoon or a recently fed snake and eventually burst at a fairly low pressure.
Yes, I learned that lesson - it was pretty embarrassing when I went back to the bike shop to tell them it was a defective tube. At first it didn't even occur to them that I tried even modest inflation outside the tire. When it came out what happened, I got that incredulous "what could you possibly be thinking" look. What's really embarrassing is that it's not like I'm a complete newbie. Just another thing that I should have known but never really thought about.
12-06-18, 06:28 AM
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Tubes are only meant to provide an air-tight cavity, and rely on the tire for structural strength. Puncture-resistant or not, outside the constraints of a tire they will stretch unevenly to resemble a cartoon or a recently fed snake and eventually burst at a fairly low pressure.
https://www.instagram.com/p/BpnlGhMg...=1nbiacbh6s775
12-06-18, 07:22 AM
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Been there. Old gas station with no gauge on the hose, you simply pumped it until it was the right firmness. I guess the bell was busted, instead of ding-ding-ding like it used to it simply went shhhhh, BOOM.
12-09-18, 07:19 PM
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Best thing to do is put air in slowly and check the tire all the way around and make sure it is properly seated before going up to higher pressures. It is what I do now after several blown tires right in my ear.
12-10-18, 11:56 AM
#32
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I don't think I've ever overinflated my tires to the point of exploding. However, I have had some pretty loud blowouts. The worst was one time some 20 years ago. I had been over at my friends garage and we had been doing some work on our bikes. It was already night outside when I was returning home - I reckon close to midnight. I was riding and suddenly heard this sound - as if some peace of wire had been picked up from the street and sucked in somewhere in the frame. I stopped, and yes, sure enough, there was a twisted piece of white metal between the tire and frame. I was still wondering where it had come from, as I didn't see it on the road, when a sudden BOOM made me deaf for short while. It was so loud and unexpected that I nearly p*ssed myself, haha. It was still echoing over the quiet town when the ringing in my ears subsided somewhat. Turns out the rear rim was worn out so badly that the freshly inflated tire ripped the rim open on one side, and the tube met the sharp edge of the crack. The gash was some 8 inches long.
12-14-18, 07:23 PM
#33
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This has *sort of* worked to make the junior mechanics more careful, but on the other hand all the senior mechanics are getting fat and all of us start drooling whenever we hear loud noises... LOL
12-15-18, 06:51 AM
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I've had cheap plastic rims from a running stroller do this.
It deformed the rims.
I dipped the bent parts in boiling water and reshaped them. When remounted, I sprayed 3M sticky spray between the tire and the bead. I keep it at 25psi and it works perfectly. The baby only weighs 22lb, so it works.
It deformed the rims.
I dipped the bent parts in boiling water and reshaped them. When remounted, I sprayed 3M sticky spray between the tire and the bead. I keep it at 25psi and it works perfectly. The baby only weighs 22lb, so it works.
12-15-18, 09:04 PM
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At the bike exchange we often have 25 or 30 volunteers working on bikes. Almost every work day someone blows a tire. When it happens everyone cheers .
We tell them to fill road tires to 70 psi and mtn bike tires to 40 psi. A little over pressure and a hot day and POW, another one bites the dust.
We tell them to fill road tires to 70 psi and mtn bike tires to 40 psi. A little over pressure and a hot day and POW, another one bites the dust.
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