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Shimano's RD-R9100 Dura Ace Rear Derailleur uses a low-profile Shadow design that keeps it more closely tucked beneath the cassette for more stable shifting and reduced likelihood of being damaged in a crash. It also allows the upper pulley to maintain a consistent distance from the cogs across all gears for more precise shifting on wider-range cassettes.
Compatible with Shimano 11-speed road groups.
- Low-Profile Shadow RD Design
- Largest Cog Size: 30T
- Minimum Cog Size: 11T
- Maximum Chainring Difference: 16T
- Total Capacity: 35T