Q-Rings are designed to take greater advantage of maximum power effort while lessening the time spent in the dead spots of a pedal rotation. Subtle but efficient 10% ovality and compatible with variety of BCDs and cranks, Q-Rings also offer 5 Optimum Chainring Positions (OCP) to fine-tune your improved riding experience and go further and faster with less fatigue. FEATURES: 10% Ovality 5 OCP settings 100% CNC, T6, 7075 Aluminum SPECS: Ring Position/Type: Outer Color: Black Drivetrain Speeds: 9/10/11 Material: Aluminum Tooth Count: 50 Chainring BCD: 110