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.

Specifications
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 realised by new FREEHUB body construction
Wide range and close step 12-speed drivetrain

Mfr Claimed Weight
461g (10-45t)
470g (10-51t)