Wolf Tooth Elliptical 104 BCD Chainring - 34t, 104 BCD, 4-Bolt, Drop-Stop B, BlackDesigned for 104 BCD Mountain Cranksets. The 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. The simplest way to explain the way these rings feel is having 2 teeth less in the