Alfine FC-S501

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Urban-styled forged alloy crankset Perfect match with Alfine internal gear hubs Single chain guard 42T chainring 42.7mm chainline BB included (SM-BB4600) Attributes BB Inclusion Ye s BCD 130 Chainline 42.7mm Crank Arm Length 170mm Crank Spindle Diameter 24mm Crankset Material Aluminum Drivetrain Spacing MTB Interface Hollowtech II Pedals Thread 9/16'' Primary Color Black Speed 1 Teeth 42 Show more