Originally Posted by
Badbalance
I ran this set up for a little while. My bars now have dents in them from the stem and I am a little frightened to use them now. they are probably fine to be honest
You over tightened them.
Originally Posted by
jonestr
Stretching 26.0 to 26.4 used to be fairly common, and frowned upon, when Cinelli was still rolling 26.4, but that was on single bolt stems so it may be more palatable on a 4 bolt stem, but you might not get as good of contact between the bar stem. If you ride really aggressively or put in lots of miles you might want to hold out for the right fit.
Old style quill stem - Bad
Two bolt pop top - You probably won't die, but make sure you've got good dental none the less
Four bolts - Either way works just fine. Just don't go gorilla on tightening this down