Shimano Deore XT CS M771 10 Speed Cassette. Featuring a wide range 11 36T gearing, the Shimano Deore XT CS M771 10 speed cassette is just what you need to tackle the most difficult off road terrain. Long after other riders have blown up or bailed out, you'll be taking advantage of more efficient gearing and full traction to climb and descend with aplomb. The cassette's chrome plated cogs are built to last while their machining coupled with alloy spiders helps reduce weight without compromising performance. And of course, the shifting is superb due to Shimano's renowned tooth configuration and shift gates.