SRAM X.7 10 Speed Rear Derailleur. The SRAM X.7 10 speed rear derailleur is a superbly reliable performer for SRAM mountain bike drivetrains. It features SRAM's signature 1:1 actuation ratio for crisp, precise shifts, every time. Also, the X.7 rear derailleur has direct cable routing that runs straight from the housing into the actuation mechanism, cutting out friction and boosting shifting performance.
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