Chainring Rival AXSA tight and consistent 13 tooth gap between chainrings delivers accurate and dependable shifting and is the core of our X Range gearing. Our 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