Originally Posted by
JohnDThompson
To prevent the locknut from affecting the threaded cup adjustment, use a second headset wrench to secure the threaded cup while tightening the locknut. No keyway necessary!
I have never been a paid mechanic nor did I ever play one on TV, but I always thought that was the way you were supposed to do it regardless. It's what I do with or without a key and my headsets stay put. Now my Italian threaded drive-side bottom bracket cups are a different story . . . .
