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 aluminumDrop Stop STCompatible with Shimano 12-speed Hyperglide+ chains on bikes with boost and non-boost spacingDesigned to be compatible with Cane Creek eeWings cranksetsElliptical rings provide smoother, more efficient pedal rotation, which means better tractionMaintains quiet and smooth performance of the Hyperglide+ drivetrain with exceptional chain retentionPrevents premature ring and chain wear that can come from non-optimized profilesItem SpecificationsDefined ColorBlackDirect Mount TypeDirect Mount SRAM 3-BoltDrivetrain Speeds12MaterialAluminumOffset3Round or OvalOvalTooth Count30 Wolf Tooth Elliptical 3-Bolt Direct Mount Chainring for Hyperglide+ Chain Direct Mount Chainrings UPC: 810006806373