The rotor q ring 4 bolt aero 110bcd chainring gives you a smoother pedal action and helps to reduce build up of lactates at threshold rotor q rings vary drivetrain resistance during a pedal rotation to align with your legrsquos natural strength spots and weak spots to boost your overall efficiency rotor q rings do not eliminate the dead spot but help to reduce its negative effects moving the legs easier through the dead spot this enables the legs to remain in the power stroke for a longer