SRAM Rival 2x12-Speed Chainring - Black - Outer, 48tSRAM 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 more range and a smoother gear progression so you're always in the right gear