Originally Posted by knobster
I have Octalink on my bike and from what I've found more and more manufacturers are moving to ISIS. Not sure what the real difference is, but I had a hard time locating a compact double FSA carbon crankset.
Octalink is proprietary to Shimano so when they moved to external bearing cups then there is nobody left use Octalink. ISIS is a standard so many manufactorers are using it.