Shimano Ultegra R8100 Crankset 12V 50/34T 160mm - Black

As the central element of the 12-speed drivetrain of the Ultegra R8100 series, the FC-R8100 crankset delivers the signature shifting quality and transmission efficiency of Shimano. Not only do the chainrings feature a Hollowglide hollow construction, but the lightweight crank arms, crafted with Hollowtech II technology, also contribute to optimized power transfer and faster, more precise shifting processes.

All of this results in a perfect balance between stiffness, stability, lightweight design, and rotational efficiency. Numerous crank arm lengths and options with 50-34 or 52-36 teeth provide variability and an optimal gear ratio for nearly every riding situation.

Hollowtech II:
The guiding principle of Shimano's Hollowtech II technology is the perfect balance between stiffness, stability, weight, and rotational efficiency. The goal was to create a crankset that minimizes the amount of force needed for propulsion while enabling more efficient power transfer. An exclusive forging process allows for the production of extremely lightweight crank arms that still guarantee maximum stiffness. Additionally, the solid connection of the right arm to the bottom bracket axle and its external bearing ensure an optimal balance between stiffness and low weight.

Specifications:
Brand: Shimano
Model: Ultegra R8100
Type: Crankset
Application Area: Road Bike
Number of Front Gears: 2
Number of Rear Gears: 12
Bottom Bracket Axle Profile: 24 mm hollow axle
Bottom Bracket Housing Width: 68, 70 mm
Chainring Design: Round
Chainring Attachment: Conventional
Chainline: 44.5mm
Q-factor: 148 mm
Material of Crank Arms, Inner Chainring: Aluminum (anodized)
Material of Outer Chainring: Aluminum (anodized), reinforced with carbon fiber reinforced plastic (CFRP)
Material of Axle: Steel (plated)
Weight: approx. 700 grams (50-34 teeth)
Color: Black

Compatibility:
Front Derailleur: FD-R9250, FD-R8150
Bottom Bracket: SM-BBR60 (threaded type), SM-BB72-41B (press-fit)
Chain: CN-M9100, CN-M8100, CN-M7100, CN-M6100