Designed as part of the Force 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.Features:- Thread Mount design is light, stiff, and accurate- Compatible with all road Flattop chains- SRAM Thread Mount Chainring Removal Tool required for installationSpecifications:- Chainring Size: 46/33T- Bolt Circle Diameter (BCD): Thread Mount- Speeds: 12- Material (Chainring): Aluminum