Designed for 110 BCD Cranksets. Its proprietary design has an ovality of 10% and a timing of 112 degrees after top dead center which provide the benefits of an oval ring without the traditional downsides of oval rings. This chainring features the patent pending asymmetrical Drop-Stop tooth design for the best in wear life, mud clearance, and chain retention. Features Wolf Tooth’s Drop-Stop tooth design for maximum chain retention. Optimized for use with 10, 11, and 12 speed chains. The simplest way to explain the way these rings feel is having 2 teeth less in the weak part of your pedal stroke and 2 teeth more where you have the most power. Not compatible with 9 speed chains. Color: Black. Material: Aluminum. Chainring BCD: 110. Defined Color: Black. Ring Position/TYPE: Chain Retaining Single Ring. Drivetrain Speeds: 10. Drivetrain Speeds: 11. Drivetrain Speeds: 12. Tooth Count: 42.