Shimano s 11 speed drivetrain technology has finally trickled down to SLX level and the CS-M7000 cassette is the key to it all. With options for 11-40t or 11-42t, the SLX CS-M7000 cassette is ideally suited to a single or double chainring drivetrain, giving you a huge gear range which ever you choose. Shimano s Hyperglide sprocket design ensures that the shifting is as crisp and smooth as we ve all come to expect from Shimano, with the Rhythm Step close ratios ensuring maximum efficiency and even gaps between gears, making it easier to maintain an efficient cadence. Machined cut aways and drilling of the sprockets keeps weight sensible, without compromising on shifting performance or durability. The CS-M7000 cassette works best when used with one of Shimano s 11 speed HG-EV chains, with the systems working together offer a silky smooth shift and incredible durability.  11 Speed Mountain Bike CassetteHyperglide Sprockets Ensure A Crisp, Smooth Shift Even Under LoadRhythm Step Close Rati