SRAM Rival 2x12-Speed Outer Chainring - 46t 107 BCD BLK For use 33t InnerSRAM Rival 2x12 Speed Outer Chainring 46t 107 BCD Black For use with 33t Inner. SRAM Rival AXS Chainrings feature a tight and consistent 13 tooth gap between chainrings delivers accurate and dependable shifting. The smaller chainrings paired with wide range 10t start cassettes provide more efficiency and more time in the big ring. Its modern gearing for todays riders. Crisp and accurate front shifts Durable finish X Range gearing technology gives you