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Ultegra R8000 Rear Derailleur Barrel Adjuster Doesn't Work, and Housing Seems Too Short? (details in comments) : r/bikewrench
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Ultegra Di2 rear derailleur recently replaced - should the silver screw be this far out/ loose? What does it adjust? : r/bikewrench
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Shimano Rear Derailleur Cable Adjusting Bolt Unit Y3E998030 Y5YC98030 Y5XG98040 Y5YE98030 - AliExpress
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