Product details:

The new Shimano Ultegra R8000 line is finally here. It may be the next step down from the Dura Ace line, but rest assured its technology is nothing short of unparalleled performance, designed to optimize input and maximize output. The R8000 11-speed 53x39T crankset is lighter than its predecessor, with a fatter profile for optimum stiffness and power transfer. A tapered crank arm and 4-bolt spider pattern seamlessly fuse together for a more streamlined, aerodynamic look. With the Ultegra R8000, no watt will be wasted.Bold new lines signal an aggressive and improved crankset
Chainrings designed for larger cassettes and disc brake bikes
Spider accommodates all sizes of Shimano road double rings
Shimano's suite of Hollow technologies reduce weight without sacrificing durability or efficiency