Originally Posted by the beef
Too bad we had forgotten to put the little securing nut onto the valve before doing so - a few pumps before we were done, the stem simply snapped.
I found that that bolt makes the stem rub harder on the inside and cause flats, I never use them. What is more likely here is that it was a cheap tube or it had a manufactures problem.
I feel sorry for the friend you dropped in the beginning.
Why didn't you guys make a smaller ride, knowing that there was a strong wind, possibility of rain, and also knowing you had a soccer game afterward.. I don't get this.