Cycle Plus BD - Shimano M4000 Alivio Shadow 3×9-speed Groupset Features: Silent: Allows you to concentrate on riding - feel nature without disturbances Slim/Smooth: Easy to control - easy shifting and braking
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Shimano Alivio Shadow Derailleur | Tern Bicycles
New Shimano Alivio RD-T4000-SGS 9-Speed Shadow Rear Derailleur Long Cage - Black 689228579101 | eBay