The Shimano FC-R8100 is a crankset part of the new Ultegra series. It is compatible with all Shimano road groups in the 2x12 standard. Designed with Hollowtech II technology, it features an integrated spindle and hollow aluminum arms that reduce weight, enhance the overall structure, and contribute to more efficient transfer of the energy generated by the rider.

The chainrings are mounted via a four-arm, asymmetric spider with no visible external bolts for better aesthetics and aerodynamic performance. It is also possible to use chainrings from the Shimano Dura Ace R9200 group. The precise and quick gear shifting certainly improves the riding experience. These features are especially valued by road cyclists and triathletes, where rapid mechanism operation is a critical factor.

Technologies:

• Hollowtech II: The best balance between stiffness, durability, low weight, and rotational performance.
• The stiffness of the crank arm, thanks to the integrated support spindle, ensures the efficiency of the pedal system, while its weight—a key component of the crankset—supports riding durability.
• The use of their own forging technology in the ultra-lightweight hollow design offers stiffness.
• The external bearing support system provides better weight distribution, improved pedal stability, and more efficient energy transfer, all in a lightweight and sleek design.