Old 04-12-17, 03:48 AM
  #2  
02Giant 
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Join Date: Jan 2011
Location: Iowa
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Bikes: 13 Orbea Orca 02 Giant Cypress 88 Mongoose ATB 79 frame-built to 80 spec. Schwinn Traveller

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Take the bike to a LBS and have them tighten to what they believe is a proper spec. If it rotates again take it back to the point of purchase for a full refund.

If you are really sold on the bike and want to keep it, I would replace the stem with one that uses a better bar retention system.
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