Crank Construction - HOLLOWTECH II Cassette Compatibility - 10 speed Chain Compatibility - Super Narrow HG for 10-speed Hyperdrive - Yes Dual SIS - Yes Chainring Sets - 39/52T Double, 30/39/50T Triple Bolt Circle Diameter - 130mm Crank Arm Length - 165/170/172.5/175mm Crank Arms - Forged aluminum/anodized Chainrings - Aluminum/anodized Chain Guard - No Bottom Bracket - SM-FC5600 (Not Included) Chain Line - 43.5mm BB Shell Width - 68/70mm The crankset is also available in a triple for an extra $40.00.
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