With its BEAM SPIDER construction, the new SHIMANO DEORE XT M8100 12-speed cassette shaves weight while increasing SHIMANO's MTB gearing range another gear. Using SHIMANO's new MICRO SPLINE freehub body and HYPERGLIDE tooth profile, these 10-45 and 10-51T cassettes deliver advanced shifting performance.

FEATURES

• Definitive shifting performance
  >>New shift ramp designs provide the fastest, smoothest shifts by HYPERGLIDE -BEAM SPIDER
  >>Lighter and stiffer construction
  >>Reduces cassette inertia resulting in faster acceleration and increased chain security
• MICRO SPLINE
  >>10T lowest sprocket realized by new FREEHUB body construction
• Wide range and close step 12-speed drivetrain