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 leverage than with the other standards.

On this crankset, the crank arm length is 172.5mm.

The crankset is 24mm. axle and is Shimano's hollow tech II.

Only fits Shimano HG+ 12-speed chains.