Wolf Tooth Elliptical Direct Mount Chainring - 34t, SRAM 3-Bolt DM, Drop-Stop ST, For SRAM Boost Cranks, Requires HG+These Wolf Tooth Elliptical Direct Mount Chainrings are designed to work with Cane Creek eeWings cranksets and SRAM direct mount cranksets with a 3 bolt interface. The proprietary Powertrac design has an ovality of 10% and a timing of 112 degrees after top dead center, providing benefits such as greater rear wheel traction. The tooth profile was developed specifically for Shimano's XTR, XT, and SLX 12 speed Hyperglide+ chain. 7075 T6 aluminum Drop