SHIMANO ULTEGRA FC-6800
Boasting a four-arm design for reduced weight and optimum stiffness, the Shimano Ultegra FC-6800 crankset - 11 Speed features a HollowTech II design. With a HollowGlide outer chainring to improve shift performance, even under a high load, it also has chainring teeth that have been developed to work in conjunction with 11-speed HG-EV chains for greater efficiency and better power transfer.