Cassette – 10speed Shimano XT M771 11-36

Shimano’s new XT-level 10-speed cassette specifically designed to work with a 10 speed drivetrain. Shimano developed Dyna-Sys with the goal of increasing rider efficiency. This means closer ratios, smoother shifts, and a more stable pedal stroke.
Uses a two-spider construction on the largest six cogs for lightness and rigidity, and prevents gouging of aluminum free-hub bodies