SHIMANO DEORE XT M8100 12 Speed Groupset include RD-M8100-SGS Rear Derailleur and SL-M8100-R SL-M8100-IR Shifter Original Parts - AliExpress Sports & Entertainment
SHIMANO XT RD-M8100-GS Rear Derailleur - 12-Speed, Medium Cage, Black
Shimano Deore XT RD-M8100-SGS Rear Derailleur - 1 x 12 Speed, Long Cage, 51T | eBay