Originally Posted by
Slaninar
As for Octalink, it has a poorly designed crank interface, so the left crank tends to work itself loose if one tends to stand on the pedals (parallel with the ground) with the right foot forward.
Mine never loosened in over 30,000 miles and I stand a lot since I like to stand while climbing. That said, I torqued both crankarms to spec using a torque wrench when I installed them so that may have prevented the problem.