Improved surface treatment 9speed Lighter weight Wide link design Total capacity SS 31T, GS 37T Cage Length Short or Medium Drivetrain Spacing ShimanoSRAM 9 Intended Use Road ShifterRear Derailleur Shimano Largest Cog 27 teeth Chain Wrap Capacity 29 teeth or 37 teeth Derailleur Action TopNormal Traditional Color SilverBlack
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