Originally Posted by
Trakhak
I dimly remember that Cinelli bars and stems used a larger diameter than, e.g., TTT, Fiamme, etc. Perhaps some of the cracked Cinelli stems had been used with an undersized bar at some point.
That might explain the cracks on these Modolo stems as well. Putting a 25.4 bar in a 26.0 stem would certainly require the user to crank down on the clamp bolt with less or no bar there to support the extra tension.