MODEL NO - RD-M8000-GS SERIES - DEORE XT M8000 Series Color - Series color Average weight - 271 Compatible chain - HG-X 11-speed Total capacity - 39T B-axle_Hollow axle - Yes B-axle 2_Hollow axle - Yes Mount_Direct attachment (Conventional) - Yes Mount_Direct mount compatible - X* Fluoric coated link bushings - 4 Low sprocket_Max. - 42T(2x11-speed), 46T(1x11-speed) Low sprocket_Min. - 40T Max. front difference - 10T Pulley_G pulley bearing - Sealed Bearing Pulley_Sunken type pulley bolt - Yes Pulley_Teeth - 11T Pulley_T pulley bearing - Sealed Bearing Pulley cage - GS Top-normal spring type_SHIMANO SHADOW RD+ - Yes Top sprocket_Max. - 11T Top sprocket_Min. - 11T Rear speeds - 11 Shimano DEORE XT M8000 Series Rear Derailleur - 11-speed