Thread: Rear Derailleur Short Cage vs Medium Cage
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Old 06-23-15 | 01:30 PM
  #11  
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Ronno6
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From: Deep South

Bikes: Cannondale SR's and ST's from the '80's

Well..................the short cage derailleur is good for 31 total teeth takeup.
The OP's requires one that will handle 34t.

Looks like the original medium cage derailleur needs to be replaced with same.
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