Designed as part of the Force E1 AXS groupset, the Thread Mount 2x chainrings are part of an innovative system to minimize weight while maximizing stiffness and power meter accuracy. Quickly swap ring sizes with an easy to use tool (sold separate).Thread Mount design is light, stiff, and accurateCompatible with all SRAM road Flattop chainsSRAM Thread Mount Chainring Removal Tool required for installation (sold separately)Crafted with high quality aluminumDesigned specifically for using with SRAM 2x compatible power meter spiderItem SpecificationsChainring BCDSRAM Thread MountColorBlackDefined ColorBlackDrivetrain Speeds12MaterialAluminumRing Position/TypeInnerRing Position/TypeOuterRound or OvalRoundTooth Count46/33 SRAM Force 2x Thread Mount Chainring E1 Chainring UPC: 710845916618