Shimano CS-M8100 Deore XT 12-Speed Cassette 

• Wide range and close step 12-speed XT M8100 cassette
• 10T lowest sprocket realized by new Micro Spline freehub body construction
• Two largest sprockets made from aluminum, to further reduce weight
• Beam Spider construction results in a lighter and stiffer cassette
• Hyperglide+: enhanced shifting speed and efficiency allows to pedal continuously while shifting up or down
• Better chain engagement and stronger retention for improved confidence over any terrain
• Weight: 470g