Shimano Alivio 9-Speed Mountain Bicycle Rear Derailleur – RD-M4000 – ERDM4000SGS

Shimano Alivio RD-M4000 Rear DerailleursResin plate body and carbon fiber reinforced plastic outer link for reduced weightLow profile “Shadow” design reduces exposure to crash damageItem SpecificationsRear Derailleur Mount TypeShimano

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