Old 10-03-11, 11:01 AM
  #8  
HillRider
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Join Date: Aug 2005
Location: Pittsburgh, PA
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Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!

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OK, a 30T cog MAY work with a 105 rear derailleur. Also, does your frame have a built in deraileur hangar or is it a separate "claw mount"?
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