Shimano CS-M8000 XT 11-speed cassette 11-46T. The SLX M8000 is a light weight 11 speed mountain bike cassette. The XT range of mountain bike gearing is the choiuce of many experienced mountain bikers. It gives you top end performance at a more affordable price than pro level XTR & also tends to be more durable. The CS-M8000 XT cassette uses Hyperglide sprockets for crisper shifting & has a close gear ratio for more efficient pedalling. Features High performance 11-speed Dyna-Sys II cassette Hyperglide sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under load Close ratio gearing allows a more efficient use of energy through finer cadence control Largest sprockets are mounted on lightweight alloy carriers to reduce weight & increase rigidity Sprockets are cut away & drilled to further reduce weight without reducing rigidity Light & durable 46T sprocket Chrome-plated finish offers hard wearing resistance to corrosion Alloy cassette lockring For 11-speed HG-X11 MTB chains