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.
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
44.5mm chainline
Specifications
Bottom Bracket Included
No
Chain Compatibility
12-Speed
Chainline/Hub Compatibility
130 Hubs
Chainring BCD
110 Shimano Asymmetric
Chainring Setup
Road Double
Intended Use
Road
Number of Chainrings
Double
Number of Speeds
12-Speed
Pedal Spindle
9/16"
Rings
50-34
Spindle Interface Type
Shimano Hollowtech II
Spindle Length (mm)
Integrated Spindle
Black - 160mm UPC
192790893747
Black - 160mm MPN
IFCR8100MX04
Black - 165mm UPC
192790893990
Black - 165mm MPN
IFCR8100AX04
Black - 170mm UPC
192790894102
Black - 170mm MPN
IFCR8100CX04
Black - 172.5mm UPC
192790894089
Black - 172.5mm MPN
IFCR8100DX04
Black - 175mm UPC
192790894003
Black - 175mm MPN
IFCR8100EX04
Tree Fort ID:
333222451542
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