Originally Posted by
alcjphil
There is virtually no functional difference between a wedge type stem and an expander type stem, The technique for removing either type is identical. The OP was wrong from the start, didn't matter if the stem used a wedge or an expender
One thing I've always wondered is how the expander type (the type that has a circular expander and... uh...expands the bottom of the stem into the steerer tube) keeps the expander from rotating? On the wedge type the wedge can't rotate, at least not much, but on the circular expander type, there's nothing to keep the expander from rotating as you tighten it.
I've never had issues with this of course, but I've always wondered. (And I've really only seen a few of the expander type vs the wedge type.)