Of all that can annoy us on a bike, interrupted shifting makes the top of the list. So, it's a good thing that the Dura-Ace CS-R9200 12-Speed Cassette is here to let us push our limits without having to think about our next gear change. Be it climbs, sprints, or all-out descents, this cassette features everything we need to handle it all. Larger cogs maximize drivetrain efficiency, but also create compatibility with both Shimano 11- and 12-speed freehub bodies. And, that's all before we dive into Hyperglide features. Cassettes with this technology mean we no longer need to back off to shift. Instead, efficiency is maximized in every gear. Plus, this is all done without increasing weight.