Hey folks, several times when repairing flats I've had problems with the tire bead seating properly in the rim in the area of the valve stem. It tends to buldge out. In a couple cases the bead has popped out of the rim entirely as I inflate. In other cases the bead stays in, but the buldge is noticable when riding, I can feel the bump-bump-bump as I ride and the buldge ticks against the fender.
I just mounted up a new Armadillo on the back ... same thing, tire buldge at valve stem! I finally got it rideable, but nowhere near perfect.
What's going on? Is this common? Anything I can do to stop this from happening?
Oh, by the way, standard aluminum rims on a Specialized Sequoia with 700-25c tires.