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Old 06-07-09, 03:14 PM
  #23  
Dan Burkhart 
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Originally Posted by qmsdc15

True to my form, I'll say before reading Grim's search results that although I've never seen a head tube cracked like that and have limited experience with threadless headsets, but I can't help thinking the crack was caused by over-tightening the headset and is probably not covered by warranty.
I seriously doubt that crack could have been caused by overtightening of a threadless headset. I believe there would just be no way you could generate that much force downward by tightening the top cap bolt before the star nut would begin to give.
Looks more like a materials defect or a faulty headset cup installation.(Not pressed in straight.), or not reamed to the proper dimension before installation.
Sometimes, steps get missed at the factory.
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