In addition to a lighter, stiffer chainring, there was one more important factor when designing Qarbon Q rings: compatibility. No need to swap out your Shimano cranks to accommodate our Qarbon Q rings, ROTOR has crafted Q rings Qarbon Shimano 110x4 just for you. Choose from 3 Optimum Chainring Positions (OCP) to fine-tune your improved riding experience and go farther and faster with less fatigue.