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- Hyperdrive SG-X chainrings
- Dual SIS front index shifting
- Pedal Spindle: 9/16″
- Rings: 44/32/22
- BB Included: Yes
This fits your .
Shimano Deore FC-M615/M610/M590/M591 Crank/Bottom Brackets Sets Hyperdrive SG-X chainrings. Dual SIS front index shifting. Color: Black. Spindle Interface Type: Shimano Hollowtech II. Pedal Spindle: 9/16″. Rings: 44/32/22. BB Included: Yes. Crank Intended Use: Mountain. Defined Color: Black. Crank Length (mm): 170. Drivetrain Speeds: 9. Number of Chainrings: Triple.