If you're searching for a cassette that can keep up with you, the SRAM RED AXS XG-1290 is your answer. As an essential component of the RED AXS drivetrain system, this cassette boasts X-Range gearing and a 10-tooth small cog that work together for a seamless gear progression. Not to mention, it's optimized for wireless electronic shifting and features a one-piece machined steel X-Dome design that reduces weight while maintaining durability. With its five one-tooth jumps and 10-tooth start, you can expect a wider range of gears and a more gradual progression to match your riding style.