Wolf Tooth Components Elliptical Drop-Stop Chainring: 34T x 104 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