Smooth, Seamless Shifting Shimano’s new Dura-Ace 12sp cassette show that the company is not just satisfied with being the best on the market. Continual improvement to what is already a revolutionary product show that Shimano wants this cassette to be the best cassette possible. Bringing their HYPERGLIDE+ technology to the road cycling scene, this CS-R9200 cassette will shift no matter the load it’s under. Want to shift in the middle on a climb? Don’t worry about backing off, this Shimano Dura-Ace CS-R9200 11-30T 12sp Cassette can handle it. Add to that the increase to 12 gears with no increase to its weight and you have the best cassette available.