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 cogs also means less weight a wider chain for better mud shedding -- it even fits on standard 10-speed freehub bodies so you don't need to buy new wheels for no reason. In short it's everything you want in a high end drivetrain.

Range	11-48
Cogs	11-13-15-18-21-24-28-34-40-48
Cassette Body Type	Shimano HG
Drivetrain Speeds	10
Color	Black
Weight	425, 662
Defined Color	Black