Sometimes less is more. With 10-speeds, 11-48t range and evenly spaced gear steps, the ADVENT X cassette allows riders to shift less often to find the right gear, while still having enough range to ride what they want.
Fewer sprockets also mean less weight and a wider chain for better mud shedding - it even fits on standard 10-speed freehub bodies so you dont need to buy new wheels for no reason. In short, its everything you want in a high-end drivetrain.
(Also compatible with Sword 1 x 10 groupset)