![Load image into Gallery viewer, Shimano-Ultegra-FC-8100-12-Speed-Crankset-172.5-mm-Double-12-Speed_CKST2101](http://365cycles.com/cdn/shop/files/CK0647_71090939-e5e8-4027-b1ce-3a1eb3690a04_400x@2x.jpg?v=1717557846)
![Load image into Gallery viewer, Shimano Ultegra FC-R8100 Crankset 172.5mm 12-Speed 52/36t Black](http://365cycles.com/cdn/shop/files/CK0647-01_d1cdabe9-b7b7-4d8e-8ef0-881b22e2d89b_400x@2x.jpg?v=1717557846)
![Load image into Gallery viewer, Shimano Ultegra FC-R8100 Crankset 172.5mm 12-Speed 52/36t Black](http://365cycles.com/cdn/shop/files/CK0647-02_17a98485-a4ec-4c16-81d3-d0d1032765de_400x@2x.jpg?v=1717557846)
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. 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.
- 148mm Q-factor
- 44.5mm chainline
- 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
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. 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.
- 148mm Q-factor
- 44.5mm chainline
- 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