MODEL NO - CS-M8000 SERIES - DEORE XT M8000 Series Average weight - 411 (11-40T) 434 (11-42T) 437 (11-46T) Remarks - Aluminum gear Combination - 11-13-15-17-19-21-24-27-31-35-40**T (bs) | 11-13-15-17-19-21-24-28-32-37-42**T (bt) | 11-13-15-17-19-21-24-28-32-37**-46**T (bu) Combination name (Group name) - 11-40T (bs) 11-42T (bt) 11-46T (bu) Type - HG Compatible chain - HG-X11, CN-LG 11-speed Type - HG Rear speeds - 11 Aluminum gear_QTY (pcs) - 2 Aluminum spider arm_QTY (pcs) - 2 HG spline (Others) - Yes HG spline (ROAD 11-speed) - Yes Steel gear_QTY (pcs) - 9 Shimano Deore XT CS-M8000 11 Speed 11-46T Cassette