Thread: If I work on adjusting shifting, do I need a derailleur tool?
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Old 03-25-16, 06:56 AM
  #6  
easyupbug 
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As said above the tension pulley and the jockey pulley should be in alignment with the sprockets when viewed from the rear. If you can see they are not aligned a tool is the right way to straighten the hanger w/o damaging anything.
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