Shimano Deore XT CS-M8100 12 Speed Cassette

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 performanceNew shift ramp designs provide the fastest, smoothest shifts by HYPERGLIDE+BEAM SPIDERLighter and stiffer constructionReduces cassette inertia resulting in faster acceleration and increased chain security MICRO SPLINE10T lowest sprocket realized by new FREEHUB body construction Wide range and close step 12-speed drivetrain SPECIFICATIONS MODEL NO CS-M8100-12 SERIES DEORE XT M8100 Series Average weight 461 (10-45T) 470 (10-51T) Combination 10-12-14-16-18-21-24-28-32-36-40-45T | 10-12-14-16-18-21-24-28-33-39-45-51T Combination name (Group name) 10-45T 10-51T Type HYPERGLIDE+ Compatible chain HG 12-speed Type HYPERGLIDE+ Rear speeds 12 Aluminum gear_QTY (pcs) 2 Aluminum spider arm_QTY (pcs) 1 MICRO SPLINE ✔ Steel gear_QTY (pcs) 10