Originally Posted by
ilike3bikes
I just tried the Challenger latex tubes. They are in the low 60s gram range. I also put 105 psi in the front tire and 110 in the back. I didn't have any trouble for 350 to 400 miles. Then, as an experiment, I decided to go back to the 120 psi I had been using in both tires. The wheels did seem faster, but in less than a mile I heard a big bang; the tube was blown outside the tire (only the valve stem was inside the tire). So, I am not sure what I will try next. Maybe a lite butyl tube. Maybe stick with the latex but just stay around 100 to 110 psi. The latex tubes do leak faster than butyl tubes, but that did not bother me. I ride almost every day and I could get two rides out of an air job. Was this just a freak accident. If you use latex tubes, do you inflate to 120 psi without having any regular problems?
It's not the tube's job to keep the tire on the rim, so the most likely answer is that you had the tube trapped between the tire bead and the rim, and it eventually heaved the bead overboard. Alternately, you may have a marginal fit between your individual tire and rim. In any case, we'd all be in serious danger if it were our inner tubes' job to keep the tires from blowing off the rim, so if you liked the tubes, maybe try again. After installing, peek between the rim and tire bead all the way around to ensure that the tube's not under the bead at all.