The chainring is made of aluminum and it is hollowed out where it is possible to save weight. At the same time, it is still made stiff enough for even the strongest riders.

It is made for Ultegra R8000 and Dura Ace 9100, because they have a special cutout where they are mounted on the crankset.

Chainring are optimized to run:

53/39

52/36

50/34