With new refinements for seamless 12-speed shifting, the Ultegra crank is now offered in a wide variety of lengths, bringing performance and improved fit for smaller riders, triathletes, and riders with specific biomechanic requirements.
5mm chainline Shimano Ultegra FC-R8100 Crankset - 170mm, 12-Speed, 50/34t, Hollowtech II Spindle Interface, Black Number of Chainrings: Double Color: Black Pedal Spindle: 9/16" Crank Length (mm): 170 Crank Intended Use: Road Chainline/Hub Compatibility: 130 Hubs Rings: 50/34 Spindle Interface Type: Shimano Hollowtech II Drivetrain Speeds: 12 Defined Color: Black Chainring BCD: 110 Shimano Asymmetric BB Included: No Shimano Ultegra FC-R8100 Crankset - 175mm, 12-Speed, 52/36t, Hollowtech II Spindle Interface, Black Number of Chainrings: Double Color: Black Chainline/Hub Compatibility: 130 Hubs Pedal Spindle: 9/16" Crank Intended Use: Road Crank Length (mm): 175 Rings: 52/36 Spindle Interface Type: Shimano Hollowtech II Drivetrain Speeds: 12 Defined Color: Black Chainring BCD: 110 Shimano Asymmetric BB Included: No Shimano Ultegra FC-R8100 Crankset - 175mm, 12-Speed, 50/34t, Hollowtech II Spindle Interface, Black Number of Chainrings: Double Color: Black Chainline/Hub Compatibility: 130 Hubs Pedal Spindle: 9/16" Crank Intended Use: Road Crank Length (mm): 175 Rings: 50/34 Spindle Interface Type: Shimano Hollowtech II Drivetrain Speeds: 12 Defined Color: Black Chainring BCD: 110 Shimano Asymmetric BB Included: No.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. Shimano Ultegra FC-8100 12-Speed Crankset Optimal balance of stiffness, strength, weight and rotational performance Hollowglide structure cuts weight yet maintains strength for better power transfer and quicker, more precise front shifting 148mm Q-factor 44.