Shimano Zee RD-M640

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Shadow Plus RD Min cog: 11 Max cog: 28(DH)/36(Freeride) For single ring set-up Total capacity: 25 Shimano Dyna-Sys 10 speed transmission Attributes RD Weight 268g Cage SS Speed 10 Primary Color Black Maximum Cog 28/36T Minimum Cog 11T RD Spring Type Shadow Plus RD Capacity 25T Show more