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The Shimano Deore RD-M591 9-Speed Rear Derailleur is a worthy derailleur whether you're riding on- or off-road. It features a long cage, mounts to the 10x1 standard, and is guaranteed compatible with any Shimano 9-Speed HG cassette and 9-Speed mountain shifters. As bike season approaches, regain crispy shifting with the Shimano Deore RD-M591 9-Speed Rear Derailleur.
Precise Chain Movement
Changes Gears Smoothly
Light Shift Effort
Shimano's Classic Double Servo-Panta Mechanism
Fluorine Coated Link Pin Bushings
Cage Length – Long
Largest Cog – 34t
Chain Wrap Capacity – 45t
Drivetrain Speeds – 9
Rear Derailleur / Shifter Compatibility – All Shimano 9-Speed HG Cassettes, 9-Speed Mountain Shifters, and 9-Speed Chains.
Rear Derailleur Mount Type – 10x1 Standard
On- & Off-Road Compatible with 28-34t Low Cassette Sprocket