Originally Posted by
Dirtdrop
Just Chuck has the assembly order correct, but I suspect that he's over tightening.
Possibly, but a roller bearing should be a able to handle a higher load than a ball bearing(In a bearing set of similar size) and I have installed thousands and adjusted tens of thousands of headsets and never had one break a race.
I beleive the lower cup has a flaw in it and does not support the race properly, but I have never looked close because the races were cheap and easy to replace. I also figured it was the price paid for a super light headset made by the guys that make Stronglight cranks.