Shimano's new flagship is the new Dura Ace 12-speed gear group where this crankset is the latest invention.

With a chainring combination of 54 and 40 teeth respectively, you get heavier gearing than with the other standards.

On this crankset the crank arm length is 170mm.

The crankset is with 24 mm. axle and is Shimano's hollowtech II.

Only fits Shimano HG+ 12-speed chains.