Shimano, XT CS-M8000, 11sp. cassette, 11-40T

Improved driving efficiency and stable shifting
Shave bike weight off without sacrificing durability or reliability
Optimal balance of lightweight and durability
Ride anywhere with smooth and precise gear changes
Combination of aluminum (40T) and steel gears
Optimized gear combination and gear ratio
Gear combination: 11-40T, 11-42T, *11-46T (new) *11-46T only compatible with 1x11-speed drivetrain
11-40T (for 3/2/1x11-speed)
Wide cassette sprocket 11-40T
11-42T (for 2/1x11-speed)
Rhythm step gear progression
11-46T (for 1x11-speed)