Old 09-04-20, 07:30 PM
  #7  
dedhed
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If it's a 105 RD-1050 which was an index derailleur it should be fine. Note that there is a difference between a "6 speed derailleur" and a "derailleur from a 6 speed" .

VeloBase.com - Component: Shimano RD-1050, 105
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