The shimano m7000 slx 11 speed cassette 11 40t the 11 speed cassette featuring light weight minimal design sprocket carrier 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 shimano m7000 slx 11 speed cassette 11 40t features 11 speed compatible average weight 467 g for 11 40t hyperglide spro