Features of the Shimano SLX CS-M7000 Cassette Lightweight, minimum design with mechanical beauty Improved driving efficiency and keep riding in efficient front driving gears Wide cassette sprocket 11-40T, 11-42T, 11-46T Optimized gear combination and gear ratio. Ride anywhere with smooth and precise gear changes Gear combination: 11-40T, 11-42T, 11-46T Lighter spider construction