Originally Posted by
monkeytusmc
I would say it was installed correctly. this happened after a couple 1000 miles on an ultegra crankset on an uphill climb. broke halfway across on the drive side arm.
Was it a larger rider? Are they a hard rider? Any material has a fatigue limit so maybe this person hit theirs or maybe it was a defect or maybe they are a torque monster or shifting under load. So many different factors that could cause issue.