The Shimano Deore XT cassette shaves weight while maintaining durability thanks to an alloy sprocket carrier. This DYNA-SYS11 technology cassette delivers precise shifting even in the most demanding mountain biking situations. Ride anywhere with smooth and precise gear changes with an optimized gear combination and gear ratio with wide cassette sprocket. Rhythm step gear progression provides improved driving efficiency and stable shifting. Optimal balance of lightweight and durability with a combination of aluminum and steel gears, which shave bike weight off without sacrificing durability or reliability.