H-Series cassettes are designed to deliver maximum durability. With all-steel construction and multi-stage heat treatment, these cassettes will stand up to whatever you can throw at them, whether it’s high torque E-bike usage or just good old-fashioned mashing.

Whether you’re building a new frame or getting a well-loved bike back on the road, R10 is designed to serve you well. It sits at the top of our R-series line of road components for a reason – with more aluminum subcomponents and a better finish, R10 is lighter, more responsive, and more durable.