Bang!

On 2005-08-18, dtmeister (aka Bruce)
was almost, but not quite, entirely unlike tea:

Quoted message said:

No idea why it decided to pop some 6 hours after I pumped it up.
Replaced tube, couldn't see any good reason for the failure.

On Monday, I pumped up my GV bike tire to 100PSI, and rode into work
fine. An hour after getting in, I was talking to my co-supervisor for
the first time in 4 months, because he was back visiting, and all of a
sudden, I heard some bacon frying in a fry pan. Knew it was my tire
within a few seconds. Left it for the day. When I went to go home, I
felt noticable resistance, then rememebered the back tire. Pulled it
out, and rememembered that pretty much last time I rode it, on Mt
Donna Buang, someone told me my wheel was out of true. Found out why
-- two b0rked spokes.

It was pretty obvious what caused the tube failure. The valve had
cuts in the side of it, but it only audibly leaked when it was held in
a certain position. I probably could have gotten home on it just
fine.

--
TimC
"I used to be better at logic problems, before I just dumped
them all into TeX and let Knuth pick out the survivors."
-- Plorkwort, 26 September 2004 on alt.religion.kibology

obviously you're bike was abducted by aliens (who ride fixies BTW 😄) and returned.

Can change in temperature make air in a tube expnd enought to make a tube go bang???

Calling MythBusters...

"Well, we inflated the tyre but on this show we only do stuff if we can BLOW IT uP!!!! 😄😄😄"

dtmeister said:

Woke up to a loud bang, followed by loud beeping from the standalone
vibration alarm attached to my sliding glass door. This was around 2am.
The only way the alarm goes off is if someone tries to open the door, or
does anything to the door that causes the glass to vibrate.

Switched on the outside light, couldn't see anything. It had been stormy
so I figured the wind may have blown something against the glass. Went
back to sleep, had another look in the morning but couldn't find
anything.

Came home this evening, and was admiring my favourite bike which had
recently come back from the LBS. Had some new wheels (32sp Alex), new
cluster, new Ultegra derailer, new chain and new Conti tyres and tubes.
It shifts oh so sweetly. Then noticed the front tyre is off the rim and
the blown tube is hanging out. I'd pumped both tyres up to the usual
120psi the night before. The bike was around 4 meters from the sliding
door. The door has blinds hanging in front of the glass. I couldn't find
any evidence that bits of rubber had hit the glass. I can only assume
the loud bang and/or sudden release of air pressure was enough to set
off the alarm...

No idea why it decided to pop some 6 hours after I pumped it up.
Replaced tube, couldn't see any good reason for the failure.

It just wanted your attention, see you've spoiled it already. Next time
it happens just ignore it and the practise will soon cease.

Zoom

In article <[email hidden]>,

flyingdutch said:

Can change in temperature make air in a tube expnd enought to make a
tube go bang?

Sure can. Usually pops the tyre off the rim.

--
Shane Stanley

Shane Stanley said:

In article <[email hidden]>,

flyingdutch said:

Can change in temperature make air in a tube expnd enought to make a
tube go bang?

Sure can. Usually pops the tyre off the rim.

Yes, but the temperature would have gone down (pumped up in the evening,
blown in the early morning) as it was pretty cold that night. So the
pressure should have reduced slightly?

It's very strange, but I'm glad it happened there and not while I was
hurtling into a corner on my commute. Bit annoyed though, I usually just
use cheap IRC tubes, but this one was a Conti. 🙁

--
..dt
1996 Diamond Back 'Expert Tg' Roadie (7spd DT shifters, favourite bike!)
2004 Trek 2300 Roadie (9spd Ultegra)
2003 DiamondBack 'Criterium' Roadie (8spd Sora, rain bike)

flyingdutch said:

obviously you're bike was abducted by aliens (who ride fixies BTW 😄)
and returned.

Can change in temperature make air in a tube expnd enought to make a
tube go bang???

Change in temperature overnight is usually downwards ie. tyre would
contract.

More likely that the tyre was not properly seated, or tube caught under the
bead, and you hadn't noticed since you last pumped it up.

cheers
Peter