SRAM X4, Rear derailleur, 9/8/7 sp, Long cage, Black

• 1:1 actuation (SRAM shifter compatible)
• 9/8/7 speed system compatible
• Min cog: 11T
• Max cog 34T
• Front difference 22T max
• Total capacity : 45T
• SRAM Model ID: RD-X4-A1

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