New NOQ (round) rings by Rotor to fit Shimano Ultegra and Dura Ace 4 bolt
These rings are compatiable with Ultegra 6800/8000 and also Dura Ace 9000/9100 c/w cover bolt set
Rotor NOQ ring upgrade will enhance the look of the crank and make you stand out from the crowd.
Rotor rings are more durable, lighter and out perform other rings on test. For this quality and price it's the only ring for the job !