Designed for 104 BCD Mountain 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. These rings are threaded, utlize with 10mm chainring bolts. Not compatible with 9-speed chains. 48mm – 50mm chainline depending on the crankset. 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. Features Wolf Tooth’s Drop-Stop tooth design. Color: Black. Material: Aluminum. Chainring BCD: 104. Defined Color: Black. Ring Position/TYPE: Chain Retaining Single Ring. Drivetrain Speeds: 10. Drivetrain Speeds: 11. Drivetrain Speeds: 12. Tooth Count: 34.