Thread: Chain sag on small cogs!
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Old 08-10-19, 06:08 AM
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JohnDThompson 
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Sounds like a chain wrap issue. A longer-arm rear derailleur would likely fix this. Sometimes, all that is needed is a little adjustment of the "B-screw" on the derailleur.


https://www.parktool.com/blog/repair...eur-adjustment
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