these are the answer

Colour:BLACK

Weight:300g (20mm rise)

SmartHead works with Presta and Schrader valves without swapping parts

Lithium-ion battery

Shimano XT CS-M8000 11 Speed Cassette - Shimano HG Splined - 11-46T - 11 Speed Back in Stock these are the answerWhether you're replacing a worn cassette or piecing together a new build, Shimano's XT level components offer great performance and durability. The M8000 11 speed cassette strikes a perfect balance between weight and reliability. Featuring a combination of aluminium and steel cogs the cassette is both, light and durable. To keep performance at a max, Shimano uses their Rhythm Step Gear Progression which gives you the best possible gear combo and