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co2 and gunshot like explosion(3 posts)

co2 and gunshot like explosionFrith
Jul 3, 2003 5:52 AM
Got a flat the other day...replaced the tube and reseated the tire and filled it with a 16g cartridge using a co2 chuck. I didn't have a gauge but the tire felt really hard.
About 1 minute later BANG!. After investigating I saw that part of the bead had unmounted itself from the rim. would this be the cause of the explosion or would the explosion be the cause of the dismount. A couple things to consider...

The tube had been in my seat pack for quite a while and the zip lock it was in was pretty scuffed and holy indicating some wear was immediatly visible on the tube itself but that doesn't mean there wasn't any.

the first flat was a slow leak probably caused by a pinch and finalized by taking a corner really tight.

16g co2 too big? It claims it will fill up to 120psi but I didn't really believe that. My tires are rated for 120.

longest post about a flat tire ever?
re: co2 and gunshot like explosionChen2
Jul 3, 2003 6:02 AM
I've had the same experience using a floor pump. It was probably due to the tire bead not seating well and/or the tube being caught between the bead and the rim. This seems to be a more common problem with new tires or tires that have a loose fit on the rim. I also choose to use the 16g threaded CO2 cartridges on the road. Next time try filling the tube slowly, stop and check the rim for problems before filling all the way. You can control the rate of fill by slowly turning the cartridge in the chuck.
Sounds like a pinched tube.jw25
Jul 3, 2003 9:02 AM
It's possible the bead wasn't seated properly, but more likely a section of tube was caught between the tire and rim. I had this happen after a 50 mile ride on the tube (front tire, too), which makes me double-check every time I put a tube in.
When replacing a tube, I remove the old one, check the tire carefully for foreign objects (if it was a puncture), and slightly inflate the new tube. Then fit the valve, and start fitting the tube inside the tire. I tuck it up into the tire, if possible, and try to get it inside the rim. This helps keep it from getting pinched while fitting the other side of the tire.
No matter what, when the tire's fitted, I go around both sides, squeezing the bead away from the rim, and looking for signs of the tube. You shouldn't be able to see it anywhere. If you do, try to work it up inside the tire. Sometimes you can do this by hand, but sometimes you need to add a little air (very little) to pop it up into place. Always check to see if this worked - yes, this means letting the air out again.
16g is big for a 23c tire, but it gives you some spare air for the tube trick above, and makes sure you're up to pressure. I carry 2 12g's and a minipump attachment (Innovations Second Wind) to make sure I have air. 12g should take a 23c tire to 100 psi, which is really plenty for a 150 lb rider like me.