Rotor q ring shimano oval aero chainring rotors philosophy is to empower every cyclist to achieve his or her maximum potential q rings boost your performance by varying drivetrain resistance during pedaling in line with your legs natural strengths and weaknesses a q ring gives a silky smooth perfect spin by smoothing out torque variations and making better use of your strongest muscles and the ocp optimum chainring position allows you to pedal comfortably in all cycling positions sitti