Originally Posted by
Darth Lefty
Found this photo of a 6800 crank cutaway... this puts more material on the leading and trailing edges and less on the sides, but being a tube it resists torsion better than an i-beam or solid beam... same reason as all the other tubes your bike is made of...
The outer chain ring is also hollow monocoque construction This is a cutaway view of a DA crankset, showing all three hollow things (spindle, crank arm, sprocket)
The hollow spindle is a good system. The arms, well, it's not all good. Based on what I've learned finding those cutaways, I've suddenly lost interest in a hollow-arm crank like this. There are many more than zero reports like this one.
failure shimano ultegra crank causes serious bicycle accident
This is much like the old style seven stem being touted as dangerous. You are just succumbing to hysteria.