Shimano Ultegra FC-R8100

The Shimano Ultegra FC-R8100 crankset is a core component of Shimano's refined 12-speed road lineup, bringing professional-level shifting speed and power transfer to a broader range of competitive cyclists. By utilizing Hollowtech II forging for the crank arms and Hollowglide technology for the outer chainring, the R8100 achieves an incredible balance of stiffness and lightweight performance. Specifically optimized for Shimano’s Hyperglide+ technology, this crankset ensures that shifting remains fast, smooth, and shock-free even under maximum pedaling pressure, making it the ideal choice for racers and high-performance enthusiasts.

Key Features

Optimized Stiffness-to-Weight: Hollow crank arms and chainrings provide maximum power transfer with minimal weight penalty.
Hyperglide+ Integration: Chainring teeth profiles are engineered for the fastest, most precise shifting ever seen in the Ultegra line.
Hollowglide Construction: The outer chainring's hollow structure increases rigidity to prevent flex during high-torque front shifts.
Modern Aesthetic: Features the signature Ultegra dark-matte finish that complements high-end carbon and alloy frames alike.

Specifications

Drivetrain Speeds: 2x12 Speed
Chainline: 44.5mm
Q-Factor: 148mm
PCD / BCD: 110mm Asymmetric 4-Arm
Compatible Chain: CN-M8100 (12-speed HG)

Typical Components Included

Right Crank Arm with Chainrings
Left Crank Arm
Crank Arm Fixing Bolt (Bottom Bracket sold separately)

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