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Shimano Ultegra FC R8100 Crankset 160mm 12 Speed 50 34t Hollowtech II Spindle Interface BLK CheckoutSpec= (31.8) 40mm 6 Color Gloss Black Crown MFPN=16820 6 Color Gloss Black Crown Race 30 Weight 2013 Wheel Size 29" External Adjustments Low Speed Compression Damping External Adjustments Lockout Threshold External Adjustments Rebound Damping Defined Color Black Positive Spring Air Stanchion Diameter 30 Steerer Tube Length (mm) 265 Ultra light hollow carbon fiber crankarms DUB bottom bracket adds durability and simplicity (DUB bottom bracket sold separately) Optimal balance of stiffness strength weight and rotational performance An integral part of the Shimano Ultegra 12 speed road lineup the FC R8100 crankset builds upon Shimano's legendary front shifting and transmission efficiency
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