.embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; height: auto; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }Designed to fit SRAM cranksets with removable spiders. Its proprietary design has an ovality of 10% and a timing of 112 degrees after top dead center which provide the beneifits of an oval ring such as greater rear wheel traction without the traditional downsides of oval rings.Compatible with 12-speed SRAM Flattop chainElliptical rings provide smoother, more efficient pedal rotation, which means better tractionDrop-Stop chainrings are designed for use with 1x9, 1x10, 1x11 and 1x12 drivetrainsCompatible with all 10-, 11-, and 12-speed chains, with the exception of Shimano 12-speed chainsShimano 12-speed chains require the use of Wolf Tooth's Shimano 12-speed specific chainringsIf using a 9-speed drivetrain, use a 10-speed chain, which will provide a tighter fit for better chain retentionNot compatible with the SRAM RED and Force AXS 8-bolt interfaceMade from 7075-T6 aluminum for long lifeUse of a clutch-style rear derailleur is recommendedItem SpecificationsChainline/Hub Compatibility135/142 MTB HubsChainline/Hub Compatibility141/148 Boost HubsChainline/Hub Compatibility150/157 DH HubsChainline/Hub Compatibility157 Super Boost HubsChainline/Hub Compatibility170/177 HubsDefined ColorBlackDirect Mount TypeDirect Mount SRAMDrivetrain Speeds10Drivetrain Speeds11Drivetrain Speeds12Drivetrain Speeds9MaterialAluminumOffset6Ring Position/TypeChain Retaining Single RingRound or OvalOvalTooth Count42 Wolf Tooth PowerTrac Elliptical SRAM 3-Bolt Direct Mount Chainrings Direct Mount Chainrings UPC: 810006801194