Exploding innertube

Author
Discussion

Itsallicanafford

Original Poster:

2,811 posts

165 months

Sunday 5th August 2018
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Just changed a slow puncture with a new tube, pumped it up to 100psi...1 minutes later it exploded...is this unusual or have I done something wrong?




untakenname

5,027 posts

198 months

Sunday 5th August 2018
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May have nipped the sidewall of the tube when putting it in?

I usually pump up to 15-20psi and then see if the bead of the tyre is seated all the way round the rim, I used to pump them straight up to full pressure without checking and occasionally five minutes later you could hear the ping as the tyre fully seated itself.

Itsallicanafford

Original Poster:

2,811 posts

165 months

Sunday 5th August 2018
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Thanks Chaps, i was rushing abit so must have pinched it, will go slower as it really went off with a bang!

Rich_W

12,548 posts

218 months

Sunday 5th August 2018
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Itsallicanafford said:
Just changed a slow puncture with a new tube, pumped it up to 100psi...1 minutes later it exploded...is this unusual or have I done something wrong?



If you read the reviews for Conti inner tubes, they are variable quality at best. Puts me off buying them, even though my "preferred" Spesh ones are £5 as opposed to £3.


Mr E

22,054 posts

265 months

Sunday 5th August 2018
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Itsallicanafford said:
Thanks Chaps, i was rushing abit so must have pinched it, will go slower as it really went off with a bang!
It happened to me once on the road bike. Went bang at about 90 psi while inflating.
Sounded like a rifle shot and it took the tyre off the rim.
Scared the crap out of me. I’m mostly a mounting biker and anything over 35 psi is uncharted territory.

S100HP

12,940 posts

173 months

Sunday 5th August 2018
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Also check rim tape covers spoke holes.

gazza285

10,118 posts

214 months

Monday 6th August 2018
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The only way a tube will burst like that is if the tyre isn’t on the rim correctly, make sure the bead is seated before inflating up to full pressure. I’ve used Conti tubes for years without any issues.

TwistingMyMelon

6,390 posts

211 months

Monday 6th August 2018
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yeah fairly common happened to me in past straight after puncture, sounded like a gunshot

Tube must have been unseated or caught on tyre

MickM

22 posts

215 months

Monday 6th August 2018
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The exact same issue with that tube couple weekends ago, prob won't be using them again!

WinstonWolf

72,857 posts

245 months

Monday 6th August 2018
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The trick is to partially inflate the tube then mostly deflate it before fitting the second bead. You only need to pop enough air in to get the tube to take it's natural shape.

PomBstard

7,052 posts

248 months

Monday 6th August 2018
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In my experience it just happens sometimes, even though you’ve checked and rechecked. I’ve had a couple of memorable tube explosions, one of which blew the tyre off my rim whilst I was riding. But this one happened in the garage at about 100psi and made my ears ring for ages...


Dog Star

16,387 posts

174 months

Monday 6th August 2018
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I had a pair of Cube E-mtbs delivered a couple of months ago, I unpacked them, checked the tyre pressures, wheeled them outside for me and the OH to try and as she was about to get onto hers the rear tube exploded - as above taking the tyre off the rim. Brand new bike, never been used.

Conti tube. Hmmmmm......

Mr2Mike

20,143 posts

261 months

Monday 6th August 2018
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Dog Star said:
I had a pair of Cube E-mtbs delivered a couple of months ago, I unpacked them, checked the tyre pressures, wheeled them outside for me and the OH to try and as she was about to get onto hers the rear tube exploded - as above taking the tyre off the rim. Brand new bike, never been used.

Conti tube. Hmmmmm......
The tyre coming off the rim is the cause of a tube blowing like this rather than an effect.

agent006

12,058 posts

270 months

Monday 6th August 2018
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Yet another reply of, yes a pinched tube. I did the same with a Michelin butyl tube last year (awesome tubes btw). On the front wheel, while on the maintenance stand, I'd pumped the wheel up on the ground, and as I was getting the tyre past the brakes the tube let go, at most 6 inches from my right ear. My neighbour came round to make sure everything was OK, it was that loud (his house is 200 or so yards away). I have lost a significant amount of hearing as a result too.

Be careful with inner tubes!

funkyrobot

18,789 posts

234 months

Monday 6th August 2018
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OP, have you checked the tyre to make sure nothing is stuck in it and snagging the tube?

As above, be careful not to pinch the tube with the tyre when fitting. Blow it up a bit when you out it on.

ClassicMercs

1,703 posts

187 months

Wednesday 8th August 2018
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Just ended up having to replace both a tube and tyre - 62mm e-bike. Think the gauge on my JoeBlow must be kaput - or doesn't like such large tubes. Just as I hit the 40psi I wanted (max 55) - bang - and it ripped the sidewall of the tyre as well.
I had just replaced the tube (Michelin) as previous attempts to repair a double puncture had failed twice. On a two week old bike.
I have now filled the tubes with Stan's (removable valve centres) rather than going tubeless - fingers crossed. Would like to add a couple more psi after first ride - better find a different tyre gauge first.

Solocle

3,585 posts

90 months

Wednesday 8th August 2018
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I got myself a slow puncture with a Conti 26 Tour Slim (yes, I am running 100 psi 28 mm tyres on an MTB). My own fault for taking of the tyre, I must have snagged it putting it back on. Those 28 mm tyres can be tough to put on, and I'd rather try it at home first, rather than the roadside.

The one time I've had a blowout was after first putting slicks on my MTB, long ago now. After a ride, the bike was outside, and I hear this almighty bang. Turned out, the metal of the rim had given way, and was peeled back like a banana.

At least OP got a fair bit of bang for his buck. getmecoat

Edited by Solocle on Wednesday 8th August 01:03

snobetter

1,179 posts

152 months

Wednesday 8th August 2018
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I was having trouble refitting a tyre, kept pinching the tube, put it down to using tyre leavers to get last bit on as I'm too weak to just push it on by hand... I then tried a bit of liquid soap on the inside of the last part of tyre and pushed it on with ease, no pinching.
Never had trouble replacing a tyre before, was the first time on a new wheel.
I may be late to the party but I'll use the soap next time.